Chemistry Quiz - Chapter 2

Question 1

Paradigm

Answer 1

model or world view accepted by scientific community.

Question 2

Data 3 subatomic partciles

Answer 2

Proton (1,+1, nucleus); neutron (1,0, nucleus); electron (1/1800, -1, shells)

Question 3

Wavelength-frequency

Answer 3

c = f x inverted y

Question 4

Energy of photon

Answer 4

E = hf

Question 5

Atomic emission spectra

Answer 5

The characteristic line spectrum that occurs as a result of energy being released by individual elements. Coloured lines on a black background.

Question 6

Atomic absorption spectra

Answer 6

The characteristic line spectrum that occurs as a result of energy being absorbed by individual elements. Black lines on a continuum (coloured) background.

Question 7

Atomic number

Answer 7

Number of protons in the nucleus.

Question 8

Mass number

Answer 8

Number of nucleons (proton and neutrons) in the nucleus.

Question 9

Aufbau principle

Answer 9

The principle that states that lowest energy levels are filled first.

Question 10

Hund’s rule.

Answer 10

Orbitals within the same sub-shell are filled singly first with electrons with same spin.

Question 11

Ionisation energy, first.

Answer 11

Energy required to remove one mole of electrons from an atom in its gaseous state.

Question 12

Uncertainty principle.

Answer 12

Impossible to know position of an electrons (we only know probability of finding the electron in a certain region).

Question 13

Isotope

Answer 13

Atoms that contain the same number of protons but a different number of neutrons.

Question 14

Orbital.

Answer 14

A region of space around the nucleus of an atom that is occupied by maximum of two electrons at any given time.

Question 15

Pauli’s exclusion principle.

Answer 15

Max 2 electrons in a single orbital and must have opposite spin.

Question 16

Relative abundances

Answer 16

The percentage of natural occurrence of an element.