2: Atoms, molecules and nomenclature

Question 1

NH4 +

Answer 1

Ammonium

Question 2

NO2 -

Answer 2

Nitrite

Question 3

NO3 -

Answer 3

Nitrate

Question 4

SO3 2-

Answer 4

Sulfite

Question 5

SO4 2-

Answer 5

Sulfate

Question 6

OH -

Answer 6

Hydroxide

Question 7

PO4 3-

Answer 7

Phosphate

Question 8

CO3 2-

Answer 8

Carbonate

Question 9

ClO3 -

Answer 9

Chlorate

Question 10

CH3COO -

Answer 10

Acetate

Question 11

What is a molecule? What group doesn’t form molecules and why?

Answer 11

2+ atoms bonded chemically. Noble gasses because they are already stable, whereas other atoms need to share/transfer electrons to become stable thus creating molecules.

Question 12

What is an ion and it’s subtypes?

Answer 12

Atom that has lost/gained electrons rendering it electrically charged. Cation: positive charge (loses). Anion: negative charge (gains).

Question 13

What is an ionic bond?

Answer 13

Metal loses electrons, non metal gains = electron transfer

Question 14

What is a covalent bond? What is polarity?

Answer 14

Both atoms need electrons, so they share in pairs. Stronger atom (more p+) is more electroneg. (pulls share e- closer to itself) being negatively polarized while the other is pos. polarized. (dipole δ+ or δ- curly S)

Question 15

What are the prefixes in nomenclature?

Answer 15

1 - Mono     6 - Hexa
2 - Di          7 - Hepta
3 - Tri          8 - Octa
4 - Tetra      9 - Nona
5 - Penta    10 - Deca

Question 16

What are the diatomic molecules?

Answer 16

I2, H2, N2, Br2, O2, Cl2, F2 (difluorine, fluorine gas)

Question 17

HCO3 -

Answer 17

Bicarbonate

Question 18

CrO4 2-

Answer 18

Chromate

Question 19

Bicarbonate

Answer 19

HCO3 -

Question 20

Chromate

Answer 20

CrO4 2-

Question 21

Ammonium

Answer 21

NH4 +

Question 22

Nitrite

Answer 22

NO2 -

Question 23

Nitrate

Answer 23

NO3 -

Question 24

Chlorate

Answer 24

ClO3 -

Question 25

Carbonate

Answer 25

CO3 2-

Question 26

Phosphate

Answer 26

PO4 3-

Question 27

Sulphite

Answer 27

SO3 2-

Question 28

Sulphate

Answer 28

SO4 2-

Question 29

Acetate

Answer 29

CH3COO -

Question 30

Hydroxide

Answer 30

OH -