The density of object A is 4.0 g/cm3 and the density of object is B 7.4 g/cm3. Which of the following statements are true about the objects?

If samples of object A and object B have the same volume, then object b will have more mass

Object A and object B have the same volume

Object A and object B have the same mass

If samples of object A and object B have the same volume, then object a will have more mas

Which of the following statements is true about density?

Density is the ratio of an object's mass to its volume

The density of an object changes as you make it smaller

D ensity is the ratio of an object's volume to its mass

The density of the object increases as you make it larger

elements heavier than Helium and lighter than carbon can best be described as the immediate result of

Formed by fusion in stars during the red giant phase

Formation of elements during the big bang

Formed on earth by scientists using particle colliders

Formed by fusion in stars during the main sequence of their life

Why does helium fusion not occur in main phase stars?

Temperatures in main phase stars are too low for helium nuclei to overcome the coulomb barrier

No helium is present in main phase stars

Hydrogen outcompetes helium in star enzymes, reducing the rate of helium fusion

The strong nuclear force prevents helium fusion from occurring in the low pressure environment of main phase stars

A supernova is an extremely energetic event that occurs at the end of the life cycles for high mass stars. A supernova results in extremely high temperatures and pressures - where a normal star has normal core temperatures of 4* 10 6 °C, a supernova can result in temperatures of up to 1 *10 11 °C. Which of the following is most likely to occur during a supernova that doesn't normally occur in stars?

Fusion nuclei heavier than silicon

Fission of nuclei lighter than iron

Fission of nuclei lighter than uranium

Fusion of nuclei heavier than hydrogen

What is the best explanation for why the Deuterium Helium-3 reaction has twice the required temperature compared to the deuterium tritium reaction?

The charge of the helium nucleus is twice that of the tritium nucleus, increasing the repulsive force between the nuclei and making the Coulomb barrier harder to overcome

The total mass involved in the deuterium-helium reaction is greater than the deuterium tritium reaction, increasing the effect of the strong nuclear force.

The product of the deuterium-helium reaction is helium-4, which is twice as stable as the helium-3 nucleus and requires more energy to make

The total mass involved in the deuterium-helium reaction is greater than the deuterium tritium reaction, decreasing the effect of the strong nuclear force

Which of the following is the best description of what a half-life is?

The time it takes for half of a sample to undergo radioactive decay

The time it takes for half of a sample to become antimatter

Half the time it takes for a sample to undergo radioactive decay

The time it takes for half of a sample to iron or lead

Which statement best describes how the half-life provides information on nuclei stability?

Nuclei with a longer half-life are more stable than nuclei with shorter half-life

Nuclei with a shorter half-life are more stable because they undergo radioactive decay sooner

There is no correlation between half-life and nuclei stability

Nuclei stability depends on the half-life for all decay products of a nuclei

Properly writing and balancing a nuclear equation requires keeping the mass conserved (balanced) on each side of the equation. Which description best explains why this is required?

The law of conservation of mass states mass is not created or destroyed in a reaction

Balancing the mass makes sure all atoms are present

Balancing the mass shows where the new mass was created

The law of conservation of mass states mass can only be created in a reaction

The Bohr model primarily differs from the Rutherford model in that it

places electrons on discrete and specific energy levels

places electrons outside the nucleus

indicates that electrons have negative charge

The potential energy of an electron is quantized, meaning that it

It can only be certain, discrete amounts, instead of being a gradient

It can be described using a number

Which of the following statements describing electron energy levels is correct?

Electrons in energy levels further from the nucleus have more potential energy

Electrons in energy levels closer to the nucleus have more potential energy

There is no correlation between energy levels and electron potential energy

Electrons in all energy levels have identical energy

How does an excited state electron configuration differ from the ground state electron configuration?

Excited electrons occupy orbitals with higher energy than the lowest energy orbital available

The excited state contains more electrons

The ground state has more than two electrons in an orbital

The spin of excited electrons is always up

Hydrogen has four spectral lines in the visible spectrum. The shortest wavelength of these is 410 nm, and the longest wavelength is 656-nm. Each line on the emission spectrum is caused by

An energized electron falling to a lower energy level and releasing energy as light

Atoms reflecting only certain colors of light from outside sources

Fusion reactions releasing radiation

The reason different elements have different emission spectra is because

Different elements have different numbers of protons and electrons

Different elements have different numbers of neutrons and electrons

Emission spectra are caused by different numbers of protons in the nucleus

Light travels at different speeds depending on the color

The reason that emission spectra are distinct lines instead of gradients is because

Electron energy is quantized, meaning that it can only be released in certain, discrete amounts

There aren't enough atoms of the element in the tube to see all the lines There aren't enough atoms of the element in the tube to see all the lines

The rest of the gradient is outside of visual range

There isn't enough potential energy to create the whole rainbow

If more lines are observed on an emission spectrum, that means that

More energy transitions are present in that element

Electrons are being totally stripped from the atom

Less energy transitions are present in that element

Enough energy is being applied to the atom to induce beta decay

chem final

Quiz

•

Chemistry

•

10th Grade

•

Practice Problem

•

Easy

•

NGSS

HS-PS1-1, HS-PS2-4, HS-PS1-8

+19

Standards-aligned

El Mohr

Used 26+ times

FREE Resource

96 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The big bang theory is an example of a scientific theory. This means that it is:

An educated guess on the origin of the universe

Speculation on the origin of the universe

A mathematical model or equation that predicts how things behave in the universe

The best available explanation for the origin of the universe, based on experiments,

observations, and mathematical models

Tags

NGSS.HS-ESS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You decide to burn a couch over the weekend in celebration of the local sports team, and reduce an old couch to ashes. Which of the following statements is true?

The total amount of matter in the universe decreased after you burned the couch

The total amount of matter in the universe increased after you burned the couch

The total amount of matter in the universe is the same before and after you burn the couch

You are unable to make a prediction about the total amount of matter in the universe

without weighing the ashes of the burned couch

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When you roll a ball down a hill, the ball gains kinetic energy. Which of the following statements is true?

The total amount of energy in the universe decreased after you rolled the ball down the hill

The total amount of energy in the universe increased after you rolled the ball down the hill

The total amount of energy in the universe stays the same after you rolled the ball down the hill

You are unable to make a prediction about the total amount of energy in the universe

without measuring the speed of the ball before and after rolling down the hill

Tags

NGSS.HS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Coulomb's law states that two electrically charged objects will feel an attractive or repulsive force between them proportional to the amount charge they have and the distance between them. Why is this considered a scientific law and not a theory?

This equation describes what will happen in a particular situation, but doesn't explain how

or why it occurs

This equation explains why or how a phenomena occurs, but doesn't describe what will

happen in a particular situation

This equation has not yet been tested enough to make it a scientific theory

This relationship is just a guess

Tags

NGSS.HS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two similarly charged objects are placed next to each other so that they are touching.
What will they tend to do?

repel

attract

no change

Tags

NGSS.HS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two opposite are placed next to each other so that they are touching. What will they tend to do?

repel

attract

no change

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As the distance between two charges increases, the force between them will

increase

decrease

stay the same

Tags

CCSS.7.RP.A.3

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chem final

96 questions

The big bang theory is an example of a scientific theory. This means that it is:

You decide to burn a couch over the weekend in celebration of the local sports team, and reduce an old couch to ashes. Which of the following statements is true?

When you roll a ball down a hill, the ball gains kinetic energy. Which of the following statements is true?

Coulomb's law states that two electrically charged objects will feel an attractive or repulsive force between them proportional to the amount charge they have and the distance between them. Why is this considered a scientific law and not a theory?

Two similarly charged objects are placed next to each other so that they are touching.
What will they tend to do?

Two opposite are placed next to each other so that they are touching. What will they tend to do?

As the distance between two charges increases, the force between them will

Two negatively charged objects approach each other. As the objects approach each other, the kinetic energy of the objects:

As the objects approach each other, the potential energy of the objects:

As the objects approach each other, the total energy of the objects:

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

chem final

96 questions

The big bang theory is an example of a scientific theory. This means that it is:

You decide to burn a couch over the weekend in celebration of the local sports team, and reduce an old couch to ashes. Which of the following statements is true?

When you roll a ball down a hill, the ball gains kinetic energy. Which of the following statements is true?

Coulomb's law states that two electrically charged objects will feel an attractive or repulsive force between them proportional to the amount charge they have and the distance between them. Why is this considered a scientific law and not a theory?

Two similarly charged objects are placed next to each other so that they are touching. What will they tend to do?

Two opposite are placed next to each other so that they are touching. What will they tend to do?

As the distance between two charges increases, the force between them will

Two negatively charged objects approach each other. As the objects approach each other, the kinetic energy of the objects:

As the objects approach each other, the potential energy of the objects:

As the objects approach each other, the total energy of the objects:

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Two similarly charged objects are placed next to each other so that they are touching.
What will they tend to do?