The emission lines of an element is characteristics of the element and can be thought of like a fingerprint for elements. Emission spectra is used to identify the elements.
What is emission spectrum ?The electromagnetic radiation spectrum produced when an electron changes from a high energy state to a lower energy state is known as the emission spectrum of a chemical element or chemical compound.
The energy difference between the two states is equal to the photon energy of the emitted photon. Each atom contains a large number of potential electron transitions, and each transition has a distinct energy difference.
An emission spectrum is made up of a variety of transitions that result in various radiated wavelengths. The emission spectra of each element is distinct. Therefore, option d is correct.
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Please help me with this question it’s really confusing lol. Question 21. Thank youuuu!! :))
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.
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.
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:
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
Answer:
1) 3m
2) 0.1 mol
3) 1.7m
4) number of moles of solute
Explanation:
Identify the arrows that represent the process of cooling.
gas
liquid
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;
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
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.
Which electrons does an electron-dot diagram represent?
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
What type of bonds typically form between two nonmetal atoms?
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.
11. If
by substituting: one mole for one dozen; methane, CHE
molecules for elephants; 10,000 grams for 10,000 tons. -
Explanation:
if you follow me I will give your answer
list of elements whose name is derived from scientist names
Answer:
Curium,Bohrium,Einsteinium,Lawrencium,Seaborgium,Ferminium
Explanation:
hello please help:) thank you!
Answer:
I think the coefficient is 2
Semimetals is a term which refers to
a small group of
elements that lie between metals and nonmetals on the
periodic table.
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
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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Imagine you are combining carbon and oxygen in a chemical reaction. If some of the carbon forms carbon monoxide instead of carbon dioxide, this would decrease the reaction's _____ of CO2.
A) total energy
B) C:O ratio
C) actual yield
D) theoretical yield
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
Answer:
A To B
Explanation:
due to distance n time
please help!!!!!!! thank you :)
Which example is a liquid at room temperature?
(a) bromine
(b) fluorine
(c) chlorine
(d) iodine
Which example is a liquid at room temperature?
answer : bromine.
Answer:
bromine is liquid at room temperature ️....
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!
The balanced chemical reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor is as follows: C3H8 + 5O2 → 3CO2 + 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 + 5O2 → 3CO2 + 4H2OLearn more at: https://brainly.com/question/3206228?referrer=searchResults
What is "plant food"?
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 : )
calculate the number of electrons of ff elements
Answer:
sorry
Explanation:
Thbrtvefvbimfvrcfnhgmn
Which of the following nonmetals can conduct electricity relatively well
sulfur
iodine
carbon
bromine
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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Which element is the most reactive?
Answer:
Cesium
Explanation:
Cesium is second from the bottom of this group, has 6 shells of electrons, and it matches the features of a reactive atom, making it the most reactive element.
One of the first major scientific discoveries of the Renaissance was made by a Polish mathematician and astronomer,
who introduced the
theory.
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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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
Answer:
A. Life science
Explanation:
Life science deals with organisms and plants are organisms.
How are radiation levels kept in balance?
Outgoing
Earth emits
Back toward the sun in the form of
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.
Why is distillation a physical change explain why and how
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
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.
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 need help with this!!!!!!
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:
How many atoms of Oxygen are represented below?
2C9H8O4
Explanation:
nnnnnnnmnnmmnnnn
eight
How are physical changes related to state of matter changes?
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
how many grams of Zn are there in 0.54 mol of Zn
Answer:
35.3052 grams of zinc are there in 0.54 mol of zn.