Periodic table

Question 1

How did new lands arrange the elements

Answer 1

Order of atomic weight
Noticed patterns, missing elements caused issues

Question 2

Mendeleev

Answer 2

Some elements yet to be discovered
Created table in 1869
Left gaps for undiscovered
Elements placed in groups based on properties
Predicted new elements using existing
Oprganised elements in order of increasing atomic number

Question 3

Group 0 name

Answer 3

Noble gases

Question 4

How many electrons on outer Shell

Answer 4

8

Question 5

Reactive or non-reactive

Answer 5

Non-reactive

Question 6

What happens down the group

Answer 6

Boiling points increase

Question 7

Group 1 name

Answer 7

Alkali metals

Question 8

Electrons in outer shell

Answer 8

1

Question 9

Melting and boiling points

Answer 9

Decrease down the group

Question 10

Reactivity

Answer 10

Increase down the group
Outer electron gets further away from nucleus so lost easily

Question 11

Why are they stored under oil

Answer 11

React vigorously with water(explode) and oxygen including moisture in air

Question 12

What happens when alkali metals react with water

Answer 12

Metal hydroxide formed and hydrogen gas given off

Question 13

What do alkali metals react with to form ionic compounds

Answer 13

Non-metals
Metal atom loses on electron to form metal ion with positive charge

Question 14

Group 7

Answer 14

Halogens

Question 15

How many electrons in outer shell

Answer 15

7

Question 16

What happens with reactivity

Answer 16

Decreases down the group as outer shell becomes further away

Question 17

Melting and boiling point

Answer 17

Increases down the group

Question 18

Transition metals

Answer 18

Group2 and 3
Form coloured compounds
Used as catalysts
Good conductors,malleable