Chemistry Test Atomic Structure 4

Question 1

Which of the following sets of quantum numbers (n, l, ml, ms) is NOT valid?

Accepted Answer

(2, 2, 0, +½)

Answer

(2, 1, 0, +½)

Answer

(3, 2, -2, -½)

Answer

(4, 3, -3, +½)

Question 2

What is the term for the energy required to remove an electron from a gaseous atom in its ground state?

Accepted Answer

Ionization energy

Answer

Electron affinity

Answer

Electronegativity

Answer

Bond dissociation energy

Question 3

Which model of the atom was replaced by the quantum mechanical model because it could not explain multi-electron atoms?

Accepted Answer

Bohr's planetary model

Answer

Thomson's plum pudding model

Answer

Rutherford's nuclear model

Answer

Dalton's billiard ball model

Question 4

How many orbitals are present in the 4f subshell?

Accepted Answer

7

Answer

3

Answer

5

Answer

9

Question 5

Carbon-12 and Carbon-14 are isotopes. Which statement accurately compares them?

Accepted Answer

Carbon-14 has 2 more neutrons than Carbon-12

Answer

They have different numbers of protons

Answer

They have different chemical properties

Answer

Carbon-12 has more electrons than Carbon-14

Question 6

Which observation from Rutherford's gold foil experiment indicated the nucleus is positively charged and dense?

Accepted Answer

Some alpha particles were deflected at large angles

Answer

Most alpha particles passed straight through

Answer

Alpha particles were absorbed by the gold foil

Answer

Alpha particles gained speed after passing through

Question 7

An atom emits a photon when an electron transitions from the n=4 level to the n=2 level. This emission falls in which part of the spectrum for hydrogen?

Accepted Answer

Balmer series (visible)

Answer

Lyman series (ultraviolet)

Answer

Paschen series (infrared)

Answer

Brackett series (infrared)