2.3

Question 1

Atoms from left side table: lose or gain electrons? Become cat/anions?

Answer 1

Mostly metals
Lose electrons
Form cations

Question 2

Atoms from right side table: lose or gain electrons? Become cat/anions?

Answer 2

Gain electrons

Anions

Question 3

What’s special about ions of transition metals?

Answer 3

Can form ions with different charges; eg, Cu(I) and Cu(II) form Cu+ and Cu2+ ions

Question 4

How many elements in binary compounds?

Answer 4

2

Question 5

How to name binary compound…

Answer 5

First element then second end with -ide (metal first)

Question 6

Polyatomic ions are…

Answer 6

Ions containing more than 1 atom

Ask

Question 7

Ammonium ion

Answer 7

NH4 +

Question 8

Hydroxide ion

Answer 8

OH -

Question 9

Nitrate ion

Answer 9

NO3 -

Question 10

Nitrite ion

Answer 10

NO2 -

Question 11

Hydrogencarbonate ion

Answer 11

HCO3 -

Question 12

Manganate(VII) (or permanganate) ion

Answer 12

MnO4 -

Question 13

Carbonate ion

Answer 13

CO3 2-

Question 14

Sulfate ion

Answer 14

SO4 2-

Question 15

Sulfite ion

Answer 15

SO3 2-

Question 16

Dichromate(VI) ion

Answer 16

Cr2O7 2-

Question 17

Phosphate ion

Answer 17

PO4 3-

Question 18

Nitride ion

Answer 18

N 3-

Question 19

Sulfide ion

Answer 19

S 2-

Question 20

Ions ending with -ite have …

Answer 20

Slightly less oxygen than ions ending in -ate

Question 21

Brackets used in formula…

Answer 21

If more than 1 of that polyatomic ion

Question 22

How are ELEMENTS shown in equations?

Answer 22

Written as just the symbol (eg K, Fe, Mg)

Except few that exist as molecules

Eg: diatomic (HONFAtBrICl), phosphorus (P4) or sulfur (S8 - though normal to write sulfur as just S)

Question 23

How are ionic compounds shown in equations?

Answer 23

Formula worked out from ionic charges - this formula called formula unit?

Question 24

State symbols.

Answer 24

s - solid
g - gas
l - liquid
aq - aqueous