Chemistry Midterm 1 review

Which of the following best describes isotopes?

• Atoms with the same number of electrons but different protons.

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

• Atoms with different atomic numbers.

• Atoms that are charged differently.

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NGSS.HS-PS1-8

If y=2x+3, what type of functional relationship does this describe?

• Linear

• Quadratic

• Exponential

• Inverse

Which element has the least error in molar mass rounding?

• Li: 6.94 g/mol

• Ne: 20.18 g/mol

• Na: 22.99 g/mol

• Mg: 24.31 g/mol

The wavelength of red light is around:

• 300 nm

• 400 nm

• 650 nm

• 800 nm

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NGSS.HS-PS4-1

The principal quantum number, n, describes:

• Orbital shape

• Orbital size and energy level

• Electron spin

• Orientation of the orbital

What is demonstrated by electron diffraction patterns?

• Electrons behave as particles.

• Electrons behave as waves.

• Electrons have no mass.

• Electrons are unaffected by energy.

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NGSS.HS-PS4-3

Which element has the electron configuration 1s²2s²2p³?

• Nitrogen

• Oxygen

• Fluorine

• Neon

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NGSS.HS-PS1-1

How many unpaired electrons are in a ground-state oxygen atom?

• 1

• 2

• 3

• 4

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NGSS.HS-PS1-1

Which of the following has the largest atomic radius?

• F

• O

• N

• Li

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NGSS.HS-PS1-1

Which of the following elements has the highest ionization energy?

• Na

• Mg

• Al

• Ne

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NGSS.HS-PS1-1

NGSS.HS-PS1-2