Chemistry Quiz

Who was the first to refer to the smallest particles composing matter as atoms?

• Democritus

• Bohr

• Thomson

• Dalton

How many electrons can a d sublevel hold?

• 2

• 5

• 10

• 14

The type of sublevel found in all principle energy levels is the _____ sublevel.

• s

• f

• p

• d

Which is the correct electron configuration for aluminum (atomic number 13)?

• 1s² 2s² 2p⁶ 3s³

• 1s² 2s² 2p⁶ 2d³

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

The s, p, d, and f sublevels are identified by __________ quantum numbers.

• principal (n)

• azimuthal (l)

• electron spin (mₛ)

• magnetic (m)

How many neutrons does the isotope ¹²⁵₂₅Re have?

• 73

• 52

• 125

• 177

Naturally occurring silver consists of two isotopes: 51.82% ¹⁰7₄₇Ag (106.9051 u) and 48.18% ¹⁰⁹₄₇Ag (108.9047 u). What is the atomic mass of silver?

• 107.8 u

• 107.8 u

• 107.9 u

• 10786.8 u

The maximum number of electrons that can be found in any atom’s second principal level is

• 2

• 6

• 8

• 10

Two different isotopes of a single element would have the same number of _______ but a different number of __________.

• protons/neutrons

• neutrons/protons

• electrons/protons

• protons/ions

The number of protons in an atom’s nucleus is its ______

• atomic mass

• atomic number

• nucleus

• atomic model