Periodic Table

Question 1

Give 2 ways in which elements are ordered in the modern periodic table

Answer 1

Atomic number
In groups based on their properties

Question 2

Explain why the group 1 elements are called alkali metals

Answer 2

They are metals that react with water to form alkalis

Question 3

Explain why Mendeleev put some elements in groups and changed the weight based order

Answer 3

To group elements based on their properties

Question 4

State the typical observations when an alkali metal is added to water

Answer 4

Fizzing
Moves on the surface of the water
Decreases in size
If K , lilac flame is produced