Polyatomic Ions

Question 1

Ammonium

Answer 1

Nh4+
1+

Question 2

Hydroxide

Answer 2

OH-
1-

Question 3

Nitrate

Answer 3

NO3-
1-

Question 4

Nitrite

Answer 4

NO2-
1-

Question 5

Hydrogencarbonate

Answer 5

HCO3-
1-

Question 6

Manganate(VII)/ permanganate

Answer 6

MnO4-
1-

Question 7

Carbonate

Answer 7

CO3 2-
2-

Question 8

Sulfate

Answer 8

SO4 2-
2-

Question 9

Sulfite

Answer 9

SO3 2-
2-

Question 10

Dichromate (vi)

Answer 10

Cr2O7 2-
2-

Question 11

Phosphate

Answer 11

PO4 3-
3-

Question 12

molecular ions

Answer 12

covalently bonded atoms/molecules that lose or gain electrons

Question 13

4 elements that dont usually form ions and why

Answer 13

beryllium, carbon, boron , silicon
requires a lot of energy to transfer outer electrons/ ionisation energy