Topic 5 Ionic Bonding

Question 1

What are cations?

Answer 1

Positive ions

Question 2

What are anions?

Answer 2

Negative ions

Question 3

How and why do ions form?

Answer 3

2 reactants in a solution react and either loos or gain electrons depending on their group, so that they have a complete outer shell of electrons, changing their charge

Question 4

What is different about an atom and an ion?

Answer 4

An atom has 0 charge, an ion has charge An atom has the same number of protons and electrons, an ion doesn’t

Question 5

What is special about group 4 ions?

Answer 5

They can either be anions or cations

Question 6

What does -ide and -ate at the end of a compound name mean?

Answer 6

-ate means that there is oxygen in it, -ide means it is pure

Question 7

What is the formula for the sulphate ion

Answer 7

SO₄^2-

Question 8

What is the formula for the chloride ion

Answer 8

Cl^-

Question 9

what is the fromula for the hydroxide ion

Answer 9

OH^-

Question 10

what is the fromula for the nitrate ion

Answer 10

NO₃^-

Question 11

what is the formula for the carbonate ion?

Answer 11

CO₃^2-

Question 12

how are ionic compounds held together?

Answer 12

the electromagnetic attraction between the negatively charged and the possitively charged ions holds the ionic compounds together

Question 13

what are the properties of ionic compounds?

Answer 13

• high meltingpoint
• soluble in water
• does not conduct as a solid
• conducts as a liquid or in solution

Question 14

why do ionic compounds have high melting and boiling points?

Answer 14

it takes a lot of energy to overcome the strong electromagnetic forces and seperate the ions

Question 15

why do ionic ompounds conduct electricity when liquid?

Answer 15

ionic compounds conduct electricity when liquid because the chargd ions can move and carry the charge through the liquid