A neutral atom of a astatine would have how many electrons 33,85,125,or 210

Answers

Answer 1
85 electrons is Astatine with atomic number 85, atomic weight 210. Astatine, symbol At, has a Face Centered Cubic structure and Silver color.

Related Questions

calculate the number of electrons of ff elements​

Answers

Answer:

sorry

Explanation:

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a bottle of acetone contains 55.0mL of acetone. If the acetone has a mass of 43.6 g. What is the density of acetone

Answers

Answer:

792.72g/L

Explanation:

density formula

density = mass/volume in L

so the density of acetone = 43.6/0.055

792.72g/L

Answer:

so 43.6g devided by 55.0ml and your density of acetone is 0.79g/ml.

list of elements whose name is derived from scientist names​

Answers

Answer:

Curium,Bohrium,Einsteinium,Lawrencium,Seaborgium,Ferminium

Explanation:

11. If
by substituting: one mole for one dozen; methane, CHE
molecules for elephants; 10,000 grams for 10,000 tons. -

Answers

Explanation:

if you follow me I will give your answer

Select the correct answer.
Which segment of this graph shows a decreasing velocity?

А. A to B

B. B to C

C. C to D

D. D to E

E. E to F

Answers

Answer:

A To B

Explanation:

due to distance n time

Why is distillation a physical change explain why and how

Answers

The process of distillation explains the difference in the boiling points of the components in the liquid mixture by transforming one of them into a gaseous state. ... As no such step occurs in the process of distillation, it is not a chemical reaction but a physical change

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What type of bonds typically form between two nonmetal atoms?

Answers

Answer:

Covalent Bonds

A covalent bond is formed between two non-metals that have similar electronegativities. Neither atom is "strong" enough to attract electrons from the other. For stabilization, they share their electrons from outer molecular orbit with others

Answer:

Covalent bonds form between two non-metal atoms.

Explanation:

Nonpolar covalent bonds form when the electronegativity values are very similar, while polar covalent bonds form when the electronegativity values are a little further apart. If the electronegativity values of two atoms are different, ionic bonds are formed.

One of the first major scientific discoveries of the Renaissance was made by a Polish mathematician and astronomer,
who introduced the
theory.

Answers

One of the first major scientific discoveries of the Renaissance was made by a polish mathematician and astronomer, Nicolaus Copernicus who introduced the heliocentric theory.

Nicolaus Copernicus (1473-1543) was born in Torun, Poland, and he introduced a book called De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) in 1543, where he stated that:

"All the spheres (planets and moons) revolve around the sun as their midpoint; therefore, the sun is the center of the universe."

At that time, the Earth was considered the center of the Universe, according to Aristotle (384-322 BC), synthesized in the Ptolemy's geocentric theory appeared in The Almagest (140 AD).

Copernicus generated controversy, mostly among the clergy and scientists, and he wrote in his book that his main intention was to propose some changes to the Ptolemy's geocentric theory that better explained planetary motion but without trying to refute it at all.

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Which of the following best defines average speed?

It is the speed of an object in a specific direction.
It is an object's speed at a specific point in time.
It is the total distance traveled over the total time.
It is a measure of how far an object moves in a certain time.

Answers

Answer:

It is the total distance traveled over the total time .

Answer:

D

Explanation:

What is "plant food"?

Answers

Answer:

Plant food is the sugars created via photosynthesis. The sugar created is glucose which can be used by the plant for energy and also to make other things like starch and cellulose.

Explanation:

Plant food is the sugars created via photosynthesis. The sugar created is glucose which can be used by the plant for energy and also to make other things like starch and cellulose. I hope this helps : )

chuyển hoá Nh3 - chu trình ure​

Answers

Answer:

umm translate

Explanation:

Please help me with this question it’s really confusing lol. Question 21. Thank youuuu!! :))

Answers

Answer:

You must write an article if you think there is a link between it asteroid impact and a dinosaur's extinction. explain the correlation between the two events I'm provide evidence within the article that you write that supports your claims.

Write a balanced chemical equation based on the following description:
the reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor
No links or point hunting!

Answers

The balanced chemical reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor is as follows: C3H8 + 5O23CO2 + 4H2O

BALANCED CHEMICAL EQUATION:

Balancing a chemical equation means ensuring that the number of atoms of each element on both sides of the equation is the same.

According to this question, gaseous tricarbon octahydride or propane gas (C3H8) reacts with oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and water vapor (H2O). The balanced equation is as follows:

C3H8 + 5O23CO2 + 4H2O

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Semimetals is a term which refers to
a small group of
elements that lie between metals and nonmetals on the
periodic table.

Answers

I guess you could call them that. In chemistry, we call them Metalloids though.

How many atoms of Oxygen are represented below?

2C9H8O4

Answers

Explanation:

nnnnnnnmnnmmnnnn

eight

Eight are there i know cause i took the test and it said i was right

How are physical changes related to state of matter changes?

Answers

Answer:

when something change physicaly the state of matter changes.

Explanation:

like ice when it is melted it turns into water a liquid.

A solid to liquid

Latisha runs a plant nursery. Which field of science would best help Latisha
learn how to grow plants?
O A. Life science
B. Space science
C. Earth science
D. Physical science

Answers

Answer:

A. Life science

Explanation:

Life science deals with organisms and plants are organisms.

An element y has 17 protons in 17 electrons. it gains one electron to form an ion. what will be the charge on an ion .right the number of protons and electrons .write the number of protons and electrons on y in detail

Answers

Answer:

A y+B 17 protons and 18 electrons

Which example is a liquid at room temperature?
(a) bromine

(b) fluorine

(c) chlorine

(d) iodine

Answers

Which example is a liquid at room temperature?

answer : bromine.

Answer:

bromine is liquid at room temperature ️....

Identify the arrows that represent the process of cooling.
gas
liquid

Answers

Answer:

Liquid - Gas is Evaporation & Gas - Cooling is condensation

Explanation:

The given image shows the water cycle in the atmosphere and hydrosphere. The cooling occurs at the clouds by condensation the evaporated water vapor cools down and precipitate as water. Hence, the arrow to the water bodies from the clouds indicates cooling.

What is water cycle?

Water cycle is a geological process by which the water content is balanced between the atmosphere and hydrosphere. The heat radiated from the sun makes the water bodies warmer by convection.

The warm water starts to evaporate to the atmosphere. The water vapor reaches the clouds from there after some time the gas starts to cool down by condensation.

The condensed water then precipitates down as rain and fills the water bodies again. The cooling process thus takes place in between the clouds from gas state to liquid state.

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The image related to your question is given below;

Which electrons does an electron-dot diagram represent?

Answers

Answer:

a representation of the valence electrons of an atom that uses dots around the symbol of the element. The number of dots equals the number of valence electrons in the atom.

Answer:

A electron dot diagram is a representation of the Valence electron of an atom that uses dots around the symbol of the element

Simplified answer = The Valence Electrons

I need help with this!!!!!!

Answers

Answer:

you got to do something then in like word then add it to files and if its the like work you gotta do you will get a good grade

Explanation:

Question #1
In a genetics investigation, students used two red straws to represent malo parent DNA. Thoy used two
green straws to represent female parent DNA. The offspring in this activity are best represented by
A
either one red straw or one green straw.
B.
two green straws.
С
two red straws.
one red straw and one green straw.
D

Answers

Answer:

D. one red straw and one green straw.

Which of the following nonmetals can conduct electricity relatively well
sulfur
iodine
carbon
bromine

Answers

It’s suppose to be graphite. But I’ll go for Carbon.

Carbon is a nonmetal that can conduct electricity relatively well. Therefore, option (D) is correct.

What is carbon?

Carbon is an element that belongs to the 14th period in the modern periodic table. The atomic number and atomic mass of carbon are 6 and 12.01 g/mol. Carbon is a nonmetal and tetravalent as it contains 4 electrons in its valence shell.

Carbon is short-lived but it can be stabilized by its allotropic forms. Carbon has three allotropes which are diamond, graphite, and fullerene. The properties of allotropes of carbon are different because of the different arrangements of carbon atoms.

In graphite, the carbon atoms are arranged in layers and are joined together. The links between the layers of the carbon atoms are weak but links between the carbon atoms in the layer are strong. The layers are slippery in nature which makes graphite soft.

Graphite is the only nonmetal that can conduct electricity and is a good conductor of electricity.

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The pressure exerted by a gas on its container is directly proportional to ________. Group of answer choices the volume of the container the mass of the individual gas molecules the Celsius temperature of the gas the number of molecules of gas in the sample the Fahrenheit temperature of the gas

Answers

The pressure exerted by a gas on its container is directly proportional to the mass of the individual gas molecules.

Gas law states that the pressure exerted by a gas on its container is directly proportional to its absolute temperature (Kelvin temperature) and number of moles of the gas.

PV = nRT

where;

P is the pressure of the gasV is the volume of the gasR is the gas constantT is the absolute temperature of the gasn is number of gas moles

[tex]number \ of \ moles = \frac{\ reacting \ mass \ of \ individual \ gas}{molecular \ mass}= \frac{m}{M}[/tex]

[tex]PV = \frac{m}{M} RT[/tex]

Thus, the pressure exerted by a gas on its container is directly proportional to the mass of the individual gas molecules.

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How are radiation levels kept in balance?

Outgoing

Earth emits


Back toward the sun in the form of



Answers

Answer:

Explanation:We known that Earths energy machine is driven by sunlight which acts as fuel for this machine and to strike a balance between outgoing long wave radiation and short wave radiation there are many factors which are involved in this process.Sun emits this energy in the form of short wave radiation because of the huge energy it has and short wave radiation are higher in energy.Hence, they reach the earth surface mostly as visible and UV rays.After reaching the earths surface what happens with these rays is that they get absorbed by the clouds and other constituents of Earth.

Now, this energy needs to be emitted back in to space in order to balance out the energy budget of earth and that is why this energy is emitted back as long wave radiation which have less energy and also earth has less energy unlike the sun.Loss of this energy is essential as Earth looses most of its energy through this and results in cooling.But when this OLR decreases it should be a cause of concern for us.

This imbalance is caused by a wide range of different human induced activities which has a cumulative effect on the temperature of earth.These activities gives rise to a huge gain in the CO2 concentration which is why this word has gain so much popularity and a cause of widespread concern for us.At community level we contribute to this heating by increasing usage of personal automobiles rather than going for public transport , advancement in technology has greatly changed our lifestyles making it more simpler and easier but this demands more energy consumption.Landscape changes are one of the most important because its taking place at a faster rate.Most of the land being cleared off to built new houses which means clearing off the existing vegetation which leads to temperature rise.Setting up of Industry depending on its type can reduce the amount of OLR escaping the surface by introducing more amount of GHGs in to the atmosphere.

Its these small communities which add up to become the entire human population causing a massive damage and hence at community level if people realize and take necessary steps things will start to change.

hello please help:) thank you!

Answers

Answer:

I think the coefficient is 2

Help!!!

How does the nucleus change in beta-plus decay?(1 point)


The mass number decreases by one, and the atomic number remains the same.

The mass number remains the same, and the atomic number increases by one.

The mass number increases by one, and the atomic number remains the same.

The mass number remains the same, and the atomic number decreases by one.

Answers

Answer:

The answer is: The mass number remains the same, and the atomic number decreases by one.

The rest of the assignment:

Polonium has a large, unstable nucleus. Through which process is it most likely to become stable?

gamma decay

beta-plus decay

beta-minus decay

alpha decay(✔️)

Which type of energy does alpha decay generate?

Potential

Sound

Electromagnetic

kinetic(✔️)

Use the equation to answer the question.

14 6C→14 7N+ 0−1e

Which type of radioactive decay does the equation model?

alpha decay

beta-minus decay(✔️)

beta-plus decay

gamma decay

How does the nucleus change in beta-plus decay?

The mass number decreases by one, and the atomic number remains the same.

The mass number remains the same, and the atomic number decreases by one(✔️)

The mass number remains the same, and the atomic number increases by one.

The mass number increases by one, and the atomic number remains the same.

An unstable nucleus undergoes gamma decay. How does the nucleus change?

It becomes less stable by repositioning its particles.

It becomes more stable by emitting energy and particles.

It becomes more stable by repositioning its particles(✔️)

It becomes less stable by emitting energy and particles.

Hope this helps

Explanation:

Which evidence did Wegener use to develop the theory of continental drift?


The Rocky Mountains are taller than the Appalachian Mountains.


The climate of Siberia has always been the same.


Mountains in North America appear to be part of the same chain of mountains as those in Northern Europe.


There is no evidence of glaciers anywhere in South America.

Answers

Answer:

Mountains in North America appear to be part of the same chain of mountains as those in Northern Europe.

Explanation: I think so

I will mark brainlist please help

1) What is the concentration of a solution that contains 6 moles of solute in 2 liters of solution

• 6M

• 12M

• 7M

• 3M


2) what is the number of moles of solute in 250 mL of a 0.4M solution?

• 0.1 mol

• 0.16 mol

• 0.62 mol

• 1.6 mol


3) the molality of a solution containing 8.1 moles of solute in 4847 g of solvent is

• 39m

• 1.7m

• 0.17m

• 598m


4) which of the following is unchanged when a solution is diluted by addition of solvent?

• volume of solvent

• mass of solvent

• number of moles of solute

• molarity of solution

Answers

Answer:

1) 3m

2) 0.1 mol

3) 1.7m

4) number of moles of solute

Explanation:

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