Chapter 2 - Atoms, ions, compounds

Question 1

Relative isotopic mass

Answer 1

the mass of an atom of an isotope compared to 1/12th the mass of an atom of carbon-12

Question 2

Relative atomic mass

Answer 2

the weighted mean mass of an atom of an element compared to 1/12th the mass of an atom of carbon-12

Question 3

Moles

Answer 3

the amount of any substance that contains as many particles as there are carbon atoms in 12g of carbon-12 isotope

Question 4

Avagadros constant

Answer 4

6.02 x 10^23

Question 5

Molar mass

Answer 5

the mass per mole of a substance

Question 6

Empirical formula

Answer 6

the simplest whole number ratio of atoms of each element present in a compound

Question 7

Molecular formula

Answer 7

the actual atoms of each element present in a compound

Question 8

Nitrate ion formula

Answer 8

NO3-

Question 9

Carbonate ion formula

Answer 9

CO3 2-

Question 10

Sulfate ion formula

Answer 10

SO4 2-

Question 11

Hydroxide ion formula

Answer 11

OH-

Question 12

Ammonium ion formula

Answer 12

NH4+

Question 13

Zinc ion formula

Answer 13

Zn2+

Question 14

Silver ion formula

Answer 14

Ag+

Question 15

e.g

Mg is dissolved in HCl describe what you would see

Answer 15

Gas would be released
Fizzes
Mg dissolves

Question 16

What are binary compounds?

Answer 16

Contains two elements only

How to name?
1st element + 2nd element -ide
Ionic compounds, metal ion comes first

e.g Sodium Oxide