Quantitive chemistry

Question 1

What is an element ?

Answer 1

An element contains only one kind of atom.

Question 2

What is a Monatomic element ?

Answer 2

An element containing only one atom e.g. the noble gases

Question 3

What is a simple molecular element ?

Answer 3

An element containing two (diatomic) or more of the same atom chemically bonded together

Question 4

what is an ionic element ?

Answer 4

There are no ionic elements !

Question 5

Are there Metallic elements ?

Answer 5

Yes, e.g. everything to the left of the staircase

Question 6

What are some examples of a giant covalent element ?

Answer 6

Diamond, graphite and silicon which are all allotropes of carbon

Question 7

what is a compound ?

Answer 7

A compound is 2 or more different atoms bonded together

Question 8

Monatomic compound

Answer 8

there are no monatomic compounds !

Question 9

what are examples of simple molecular compounds ?

Answer 9

CO2, CO, NO, NO2, SO2, SO3, NH3, CH4, H2S

Question 10

what are examples of Ionic Compounds ?

Answer 10

Hydrochloric acid (HCL) sulfuric acid (H2SO4) nitric acid (HNO3) Phosphoric acid (H3PO4)

Question 11

…. In ionic compounds have to …….

Answer 11

1. charges

2. cancel out

Question 12

what is an example of a giant covalent compound ?

Answer 12

Silicon dioxide (SIO2)

Question 13

what is the charge of group 1 ions ?

Answer 13

1+

Question 14

what is the charge of group 2 ions?

Answer 14

2+

Question 15

what is the charge of group 3 ions ?

Answer 15

3+

Question 16

what are some other common positive ions?

Answer 16

Silver (Ag+) Zinc (Zn2+) ammonium (NH4+) hydrogen (H+)

Question 17

an element has to ….. an electron to become a ….. ion

Answer 17

1. loose

2. positive

Question 18

what is the charge of group 7 ions ?

Answer 18

1 -

Question 19

what is the charge of group 6 ions ?

Answer 19

2 -

Question 20

examples of other common negative ions ?

Answer 20

Nitrate (NO3^-) Sulfate (SO4^2-) carbonate (CO3^2-) hydrocarbonate (HCO3 ^ -) hydroxide (OH^-) hydride (H^-) phosphate (PO4^3-) silica (SiO2)