2.1 Atomic Structure

Question 1

Isotope definition

Answer 1

Atoms of the same element with a different number of neutrons

Question 2

Relative Atomic Mass Definition

Answer 2

Th weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom of carbon-12

Question 3

Relative Isotopic Mass Definition

Answer 3

The mass of an isotope relative to 1/12th of the mass of an atom of carbon 12

Question 4

what is the unit for atomic mass

Answer 4

u

Question 5

what is the relative atomic mass of a proton/neutron

Answer 5

1u

Question 6

What is an atomic orbital

Answer 6

an area around the nucleus that holds up to 2 electrons with opposite spin.

Question 7

what are the 4 types of orbitals (in order)

Answer 7

s,p,d,f

Question 8

what is the shape of an s orbital

Answer 8

sphere

Question 9

what is the shape of a p orbital

Answer 9

dumbbell

Question 10

what contributes to the size of the orbital

Answer 10

the number of electrons

Question 11

order of orbitals from 1s to 4f

Answer 11

1s,2s,2p,3s,3p,4s,3d,4p,4d,4f

Question 12

Aufbau Principle

Answer 12

the lowest energy sub-levels are occupied first

Question 13

what is electron ‘spin’ property

Answer 13

when a orbital contains 2 electrons they repel each other and spin oppositely either up or down.

Question 14

Hund’s rule

Answer 14

Orbitals must be filled singly before pairing up.