Group 1 - the alkali metals

Question 1

Group one elements have how many electrons in the outer shell

Answer 1

They have 1 electron in the outer shell

Question 2

Group one elements are
A.colourless gases
B.reactive low density metals
C.coloured metals

Answer 2

They are reactive , low density , soft metals

Question 3

What is the name of group one metals

Answer 3

They are the alkali metals

Question 4

Going down the group alkali metals get increasing or decreasing reactivity ?

Answer 4

As you go down the group the reactivity INCREASES because as there are more shells the outer electron is further away from the positive nucleus- this means that the forces of attraction between the nucleus and the electron decreases and therefore making it easier to LOSE the outer electron so it’s MORE reactive

Question 5

What charge does an alkali metal make ?

Answer 5

Alkali metals make 1+ POSITIVE ions because one electron is being lost and an electron has a negative charge and when a negative charge is lost that means there’s more positive charge

Question 6

They form what with non metals
A. Ions
B.ionic compounds
C.isotopes

Answer 6

It’s so easy for alkali metals to lose the outer electron so they only react to form ionic compounds, these compounds are usually white solids that dissolve in water to form ionic compounds

Question 7

When alkali metals react with water they form ??

Answer 7

EG for sodium

Sodium hydroxide+ hydrogen

Question 8

When alkali metals react with chlorine they form ??

Answer 8

Sodium EG

Sodium chloride

Question 9

Reaction with oxygen

Answer 9

They can react to form a metal oxide but sodium forms sodium oxide mainly but also makes sodium peroxide
Potassium makes potassium peroxide and potassium superoxide

Question 10

Does the alkali metals have a higher or lower melting point going down the group

Answer 10

They have lower melting and boiling points

Question 11

Do they have lower or higher relative atomic mass going down

Answer 11

Higher relative atomic mass going down

Question 12

Properties of alkali metals

Answer 12

Shiny , soft , silvery , reactive , low density high thermal and electric conductivity

Question 13

Why are alkali metals called alkali metals

Answer 13

Because when they react with water they leave an alkaline solution

Question 14

Does the density increase going down

Answer 14

YES

Question 15

But however does their softness increase

Answer 15

Yes