10th Grade Chemistry Interim Review Assessment

Which subatomic particle defines an element's identity?

• Electron

• Neutron

• Proton

• Isotope

In the Bohr model of the atom, electrons are depicted as:

• A "plum pudding" distribution

• Orbiting the nucleus in fixed energy levels

• A cloud of probability around the nucleus

• Stationary particles within the nucleus

The Rutherford model of the atom introduced the concept of:

• Electron shells

• Neutrons

• A dense, positively charged nucleus

• Wave-particle duality

Tags

NGSS.HS-PS1-8

Which of the following best describes isotopes?

• Atoms with different numbers of protons

• Atoms with different numbers of electrons

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

Tags

NGSS.HS-PS1-8

How does the relative abundance of isotopes relate to an element's atomic mass?

• It has no effect on atomic mass

• The most abundant isotope always determines the atomic mass

• The weighted average of isotope masses determines the atomic mass

• Only the heaviest isotope contributes to the atomic mass

Which process is responsible for the production of elements heavier than hydrogen in stars?

• Nuclear fission

• Nuclear fusion

• Radioactive decay

• Electron capture

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

In a flame test, what causes the characteristic color of the flame?

• The release of protons

• The movement of electrons between energy levels

• The fusion of atomic nuclei

• The splitting of atomic nuclei

Tags

NGSS.HS-PS1-2

The electron configuration of a neutral sodium atom is:

• 1s^2 2s^2 2p^6 3s^1

• 1s^2 2s^2 2p^6 3s^2

• 1s^2 2s^2 2p^6 3s^2 3p^1

• 1s^2 2s^2 2p^5

Tags

NGSS.HS-PS1-1

How many valence electrons does a chlorine atom have?

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

As you move from left to right across a period on the periodic table, the atomic radius generally:

• Increases

• Decreases

• Remains constant

• Fluctuates randomly

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2