Chemistry with the BaldMANs

Question 1

What are the energy levels for Oxygen?????

Answer 1

1s2 2s2 2p4

Question 2

Does ionisation energy increase/decrease across a period? Why?

Answer 2

1. Increase
2. Increasing nuclear charge

Question 3

Does ionisation energy increase/decrease down a group? Why?

Answer 3

1. Decrease
2. Increasing energy levels, shielding effect

Question 4

Does electronegativity increase/decrease across a period? Why?

Answer 4

1. Increase
2. Nuclear charge increases

Question 5

Does electronegativity increase/decrease down a group?

Answer 5

1. Decrease
2. Shielding, increasing energy levels

Question 6

Does the atomic radius increase/decrease across a period? Why?

Answer 6

1. Decrease
2. Increasing nuclear charge

Question 7

Does the atomic radius increase/decrease down a group?

Answer 7

1. Increase
2. Increasing energy levels, shielding effect

Question 8

What is ionisation energy?

Answer 8

The amount of energy needed to remove an electron from a neutral atom in gas form

Question 9

What is electronegativity?

Answer 9

The ability of an atom to form bonds with an electron

Question 10

State the energy levels up to 4p6

Answer 10

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Question 11

Describe electron affinity

Answer 11

The ability of an atom in the gas state to accept an electron and form a negative ion

Question 12

List some properties of an ionic bond

Answer 12

1. Hard and brittle
2. Not easily scratched
3. Will shatter when impacted on by a force
4. Not conductive in solid state
5. Good conductor in molten/aqueous state
6. HIGH melting and boiling points

Question 13

Aufbau principle

Answer 13

electrons enter lowest orbital first

Question 14

Pauli exclusion principle

Answer 14

The atomic orbital can only contain 2 electrons at most, at any time

Question 15

Hund’s rule

Answer 15

Subshells must be filled by one electron before adding a second electron to the orbital

Question 16

Metal valency (cats): +/-

Answer 16

+

Question 17

Non-metal valency (anion): +/-

Answer 17

-