Atomic Numbers

Question 1

Define an isotope

Answer 1

Atoms of an element with different numbers of neutrons

Question 2

What are group 0

Answer 2

Noble gases

Question 3

Describe noble gases

Answer 3

Very unreactive elements
= full outer energy shell
Boiling points increase as relative atomic masses increase

Question 4

Describe metals reactions

Answer 4

When they react they lose electrons to achieve a full outer energy level

Question 5

What are group 1 called

Answer 5

Alkali metals
Have one electron in their outer shell

Question 6

Describe electrons in group 1

Answer 6

As we move down the group
= outer electron is less attracted to the nucleus and easier to lose
= because there’s a greater distance between positive nucleus and negative outer electron

Question 7

What is group 7

Answer 7

Halogens

Question 8

Describe what group 7 forms

Answer 8

Form molecules with two atoms joined by a covalent bond

Question 9

What happens when group 7 react with metals

Answer 9

Form ionic compounds
Gain one electron and become -1 ion

Question 10

Describe an alkali metal

Answer 10

Soft metals
Relatively low melting points
Low density
React rapidly with oxygen, chlorine and water
Form 1+ ion

Question 11

Describe a transition element

Answer 11

Hard and strong metals
High melting point
High density
Much less reactive than group 1
Can form ions with different charges