Unit 1

Question 1

Electrons can only posses fixed amounts of energy known as

Answer 1

Quanta

Question 2

1s Orbital

Answer 2

1= first energy shell S=shape (spherical)

Question 3

P orbital

Answer 3

2 balloons tied together at nucleus. 3 at each energy level- px, py, pz. Higher level= more long

Question 4

d orbital

Answer 4

In 3rd +, 5 types- dxy, dyz, dxz, dx2-y2, dz2

Question 5

f orbital

Answer 5

4rth + 7 types

Question 6

quantum number n

Answer 6

principle quantum number, energy level, whole numbers

Question 7

quantum number l

Answer 7

Angular momentum, determines orbital shape n-1

Question 8

quantum number ml

Answer 8

Magnetic quantum number, orientation in space, -L~+L

Question 9

quantum number ms

Answer 9

Spin magnetic quantum number, determines spin direction, 1/2 or -1/2

Question 10

Pauli exclusion principle

Answer 10

no two electrons in an atom can have the same 4 quantum numbers, ms differs

Question 11

Aufbau principle

Answer 11

orbitals fill in order of increasing energy. 4s then 3d

Question 12

Hunds rule

Answer 12

degenerate orbitals fill singly before pairing up

Question 13

s orbital holds

Answer 13

2 electrons

Question 14

p orbital holds

Answer 14

6 electrons

Question 15

d orbital holds

Answer 15

10 electrons

Question 16

First ionisation energy

Answer 16

Energy required to remove one mole of electrons from one
mole of gaseous atoms, to give one mole of gaseous single
charged ions.
Na(g) –> Na+(g) + 1e-