Chemistry High School

I just need an answer for question 3,4 and 5. thank you so much. ​

I Just Need An Answer For Question 3,4 And 5. Thank You So Much.

Answers

Answer 1
Number 3,In 1913,Neils Bohr,a student of Rutherford’s developed a new model of the atom.number 5,the chemical elements are arranged in order of increasing atomic number.elements in the same group have similar chemical properties. Hope this helps!

Related Questions

What does the speed of the mixing colors tell you about the speed of the
molecules in hot and cold water?

Answers

Since the colors moved faster in the hit water, it means that the water molecules in the hot water move faster than the molecules in the cold water.

When bonding, what is most likely to happen between the atoms listed below?

A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X

Answers

Answer:

atom x will accept electrons from atom y

Explanation:

in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x

this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.

i'll mark brainliest if you can answer this quick and correctly only correct cause i don't accept bad answers or i'll report you if i get a bad grade
'

Answers

3) A
4) C
brainliest ?

animals need to consume other organisms for energy. how would you categorize them based on that information?

Answers

Answer:

They would be carnivores.

Explanation:

what are the spectrum lines, and they're color emmited and nanometers

Answers

Emission lines are seen as coloured lines on a black background. Absorption lines are seen as black lines on a coloured background. The presence of spectral lines is explained by quantum mechanics in terms of the energy levels of atoms, ions and molecules.

i hope it is helpful:) mark as brainlist

What is the term used to describe a change in motion?

Answers

Answer:

it should be momentum if im not mistaken

What are the physical properties of gases, and how do they change under certain conditions?

Answers

Answer: Gases expand to fill their containers, have a fluid nature, low density, can be compressed, diffuse and effuse - move in small hole spray perfume .

Explanation:

Gases have such an unpredictable nature like fluid, very low density, can be condensed, disperse and effuse move in tiny hole spray fragrance, and they dominate far more room than the fine solids out of which they establish. 

Because gases are harder to identify directly, gases are defined using four physical qualities or observable characteristics such as temperature, density, particles number, and volatility.

Learn more:

https://brainly.com/question/1369730?referrer=searchResults

How long does it take for the water to start boiling? At what temperature does the water boil?

Answers

Answer:

At sea level, or at zero feet in altitude, the boiling point of water is at 212 °F (100 °C). Once the water has reached this boiling point, the US Center for Disease Control recommends keeping it at a rolling boil for about a minute to make sure it is purified.

Answer:

Water boils at 212 degrees fahrenheit or 100 degree celcius

Explanation:

its true

What does it mean for an element to be oxidized?

A. The element is a spectator ion in a chemical reaction.

B. The element has gained one or more electrons in a reaction.

C. The element has lost one or more electrons in a reaction.

D. The element has bonded to another element with opposite charge​

Answers

Answer:

B

Explanation:

Oxidation occurs when an atom molecule or ion loses one or more electrons in a chemical reaction when oxidation occurs the oxidation state of the chemical species increases oxidation doesn't necessarily involve oxygen originally the term was used when oxygen caused electron loss in a reaction hope this helped. :)

An element is oxidized when It has loses one or more electrons in a chemical reaction. Therefore, Option (C) is correct.

What is Oxidation ?

The loss of electrons, gain of oxygen or loss of hydrogen will be considered as Oxidation.

The gain of electrons, loss of oxygen or gain or hydrogen will be considered as the Reduction.

Rusting is one of the popular example of oxidation.

Therefore, An element is said to be oxidized when It has lost one or more electrons in a reaction.

Hence , Option (C) is correct.

Learn more about Oxidation here ; https://brainly.com/question/16976470

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Annalise observes a streak of light in the sky and says she is seeing a shooting star. What is she most likely observing?

a falling star
an asteroid
a meteor
a dwarf planet

Answers

Answer: A Meteor

Explanation:

A streak of light in the sky and says she is seeing a shooting star. She's most likely observing is a meteor. Therefore, option C is correct.

What is a meteor ?

A meteor is an object from space or a meteoroid that touches down on Earth. The air on the space rock creates drag that causes it to become incredibly heated as it falls toward Earth.

When the earth travels through cometary debris during its orbit around the Sun, meteor showers will result. Although the Earth's orbit around the Sun is nearly round, the majority of comets have very elliptical orbits.

A meteoroid becomes a meteor, or a streak of light in the sky, if it gets close enough to Earth and enters its atmosphere. These light striations are sometimes referred to as "shooting stars" due to their appearance. However, stars are not what meteors are.

Thus, option C is correct.

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the number of protons will tell you what elements it is. T or F plzz help​

Answers

Answer:

True

Explanation:

There are two ways to tell elements apart from each other: the atomic number or the number of protons. The atomic number tells the number of protons in the element.

For example:

There are two given elements. One has 3 protons and an atomic number of 3 while the other has 7 protons and an atomic number of 7. Which one is Lithium?

Lithium has an atomic number of 3, which means it has three protons, which means Lithium is the one with 3 protons.

please answer its due in 10 minutes teacher just assigned it 5 minutes ago

Answers

Answer:

please upload a clearer picture

Answer:

1 Rain falling down

2)Freezing

3)Melting 4)Adding or removing energy from matter causes a physical change as matter moves from ome place to the other5)5he

A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.

Experimental Group:


Control Group:

Answers

Experimental group is the ducks in cold water
And the control group is the ducks in room temperature water

PLEASE HELP ME!!
Water (H2O) is composed of the same elements as hydrogen peroxide (H2O2).

Why do these substances have different properties?


The molecules are the same.


Water has more atoms than hydrogen peroxide.


The atoms are arranged differently in each molecule.


The atoms are the same.

Answers

Answer:

The molecules are the same.

Explanation:

The mass of an object is 24g and the volume of the object is 16 mL. Calculate the
density of the object?

Answers

Answer:

D = m/v

Explanation:

So m = 24g and v = 16mL. (I assume these are the units being used). Then, we get D = 24g/16mL which is 1.5 g/mL

determine the density of a liquid if 75 mL of the liquid have a mass of 63 g

Answers

Answer:

The answer is 0.84 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 63 g

volume = 75 mL

We have

[tex]density = \frac{63}{75} = \frac{21}{25} \\ [/tex]

We have the final answer as

0.84 g/mL

Hope this helps you

The Periodic Table of elements is arranged by:
O atomic mass
O number of neutrons
O number of electrons
O atomic number

Answers

Answer:

atomic number

Explanation:

Answer:

number of electrons and number of neutrons

How many elements make up Sodium Bicarbonate?

Answers

Sodium bicarbonate (NaHCO3) is made up of 4 elements , Na, C, H, and O
4 elements! And it has the chemical formula NaHOC3. It has one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms. Hope this helps!!!

Helium gas (He) is an element and not a compound. Why is this true?

Answers

If we fill up a balloon with just helium gas, it will only contain helium atoms.

Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .

Pleasee help I’ll mark you as brainlister
Fill in the blank

Answers

Answer:

the answer is 2 valence electrons

The formula for density (D) is D = m/v, where m is mass and v is volume. What is the mass in grams (g) of a 45.0 cubic centimeters (cm³) block of silicon if the density of silicon is 2.336 grams per cubic centimeters (g/cm³)

A. the mass is 0.0519 g.
B. the mass is 19.3 g.
C. the mass is 45.0 g.
D. the mass is 105 g.
​

Answers

Answer:

The answer is D. The mass is 105g.

when is an object in free fall

Answers

Answer:

a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.

Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar

Answers

Answer:Condensation

Explanation:

it

Answer:

convection

Explanation:

I took test I got 100%

what is the orbital notation for silver?

Answers

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10

Explanation:

I think

1s2 2s2 3s2 i think i’m not sure

PLEASE I NEED HELP ASAP.

Answers

Al = 13 protons, 10 electrons, 14 neutrons

S = 16 protons, 18 electrons, 17 neutrons

P = 15 protons, 18 electrons, 19 neutrons

Hope this helped!

Fill in the blank to the Periodic Pun
Oh, I ate too much! Now I’m going to _________________ the rest of the night.

Answers

Answer:

stay up?...or shxt the rest of the night

Answer:

Answer C

Explanation:

Quartzite is a coarse-grained rock derived from sandstone.

Which type of rock is quartzite?


metamorphic


extrusive


sedimentary


igneous

Answers

its a metamorphic rock

Answer:

granoblastic metamorphic rock

Explanation:

A substance has an atomic number of 80 and a mass number of 178. How many protons does this atom have? How many neutrons does it have? How did you determine this? Write your answer in ACES format.

Answer:

Cite (source and evidence):

Explain:

Summarize:

Answers

Answer:

This atom has 80 protons and 98 neutrons.

Explanation:

All atoms are composed of a central nucleus in which there are positively charged particles, the protons, and neutrally charged particles, the neutrons, around which other negatively charged particles, called electrons, move.

The atomic number, identified with the letter Z, indicates the number of protons that are present in the nucleus of an atom. The atomic number defines the electronic configuration of the atom and allows the ordering of the different chemical elements in the periodic table.

If a substance has an atomic number of 80, this atom has 80 protons.

The mass number indicates the total number of particles in the nucleus, that is, the sum of protons and neutrons.

mass number = number of protons + number of neutrons

In this case you know that the mass number is 178 and number of protons is 80. Then

number of neutrons=mass number - number of protons

number of neutrons= 98

So this atom has 98 neutrons.

What happens to particles in a sample of liquid when the liquid is heated and cooled?

Answers

If a liquid is heated it’s particles are given more energy and will move faster, however if it is cooled, it’s particles slow down and come closer together.

A force is always a push. true or false ?

Answers

True because ur using the force to push
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But it may be as well to reproduce, in part, the description given in the posters:BARLOW'S GREAT NORTH AMERICAN CIRCUS.Now in its triumphal march across the continent, willgive two grand performances,AT SMYRNAon the afternoon and evening of May 18th.Never in all its history has thisunparalleled show embraced a greater variety of attractions,or included a larger number of world-famousacrobats, clowns, bare back riders, rope walkers, trapezeartists, and star performers,in addition to a colossal menagerie, comprisingelephants, tigers, lions, leopards,and other wild animals in great variety.All this and far more, including a hundredDARING ACTS,can be seen for the trifling sum of fifty cents;children half price.COME ONE! COME ALL!Two boys paused to read this notice, pasted with pictures of elephants and circus performers on the high board fence near Stoddard's grocery store. 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What is the name of the element on the periodic table with the symbol W Wellness is the struggle to keep all the components of health at their best possible levels.Please select the best answer from the choices provided.OF As the senior prefect of your school write a letter to the headmaster discussing two reasons why the school should instil moral values into the students What are the principles that you value most and why? Which best explains the message the Monroe Doctrine sent to other nations?a.that the United States was powerful enough to stop new colonization in the Americasb.that the United States was afraid of each nation that sought to colonize the Americasc.that the United States wanted to take over other nations in Europe and in the Americasd.that the United States feared the power of European nations and would allow them to colonize the Americas what is the most powerful qoute How did women's role differ in Africa from other Islamic areas of the world? 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