Compounds

Question 1

How do compounds form ?

Answer 1

When elements react and atoms combine with other atoms

Question 2

How are compounds held together ?

Answer 2

With a chemical bond of two or more elements

Question 3

How do you make the bonds ?

Answer 3

Taking away, giving or sharing electrons

Question 4

What is an ion ?

Answer 4

Metal and a non-metal chemically bonded together

Question 5

What happens to a metal atom ?

Answer 5

Lose electrons to form positive ions

Question 6

What happens to a non-metal

Answer 6

Gain electrons to form negative ions

Question 7

Why do the opposite charges mean ?

Answer 7

Strongly attracted

Question 8

What is covalent bonding ?

Answer 8

When a 2 non-metals chemically react together

Question 9

What happens in a covalent bonding ?

Answer 9

Each atoms shares an electron

Question 10

H2 SO4 + NaOH > Na2 SO4 + H2O

Answer 10

H2 SO4 + 2Na OH > Na SO4 + 2H2O

Question 11

What is different about a mixture ?

Answer 11

There is no chemical bond

Question 12

How can you separate mixtures

Answer 12

Filtration, crystallisation, simple distillation, fractional distillation, chromatography