Core Chemistry

Question 1

What is the charge on a sulphide ion?

Answer 1

2-

Question 2

What is the charge on a lead ion?

Answer 2

2+

Question 3

What is the formula for nitrogen?

Answer 3

N2

Question 4

What is the formula a hydrogen carbonate ion?

Answer 4

HCO3 -

Question 5

What is the formula for a hydrogen sulfate ion?

Answer 5

HSO4 -

Question 6

What is the formula for a nitrate ion?

Answer 6

NO3 -

Question 7

What is the formula for a carbonate ion?

Answer 7

CO3 2-

Question 8

What is the formula for a sulfate ion?

Answer 8

SO4 2-

Question 9

What is the formula for a dichromate (VI) ion?

Answer 9

Cr2O7 2-

Question 10

What is the formula for a phosphate ion?

Answer 10

PO4 3-

Question 11

What is the formula for a chlorate (I) ion?

Answer 11

ClO -

Question 12

What is the formula of phosphoric acid?

Answer 12

H3PO4

Question 13

What is the formula for sulfuric acid?

Answer 13

H2SO4

Question 14

When naming covalent compounds from their formula, what prefix is used for each number of atoms in the molecule?

Answer 14

1 = mono
2 = di
3 = tri
4 = tetra
5 = penta
6 = hexa
7 = hepta