PERIODIC TABLE- group 1

Question 1

what happens when lithium react with water?

Answer 1

1- floats (low density)
2- fizzes (hydrogen gas released)
3- UI turns purple (alkali) (from green= neutral)
4- moves around
5- stays in same shape, but dissolves (gets
smaller)
6- reacts with and dissolves into the water.

Question 2

what happens when sodium reacts with water

Answer 2

1- floats (low density)
2- fizzes (hydrogen gas released)
3- UI turns purple (alkali) (from green= neutral)
4- moves around
5- melts into a BALL
(gets very hot= hotter than Li= more reactive)

Question 3

what happens when potassium reacts with water

Answer 3

1- floats (low density)
2- fizzes (hydrogen gas released)
3- UI turns purple (alkali) (from green= neutral)
4- moves around
5- melts into a BALL
6- SELF- IGNITES
(gets very hot= hotter than Na= more reactive)

Question 4

how many electrons do they want to lose

Answer 4

one electron
therefore they all react similarly
but their reactivity changes due to their size

Question 5

what happens as they go down the group

reactivity explained

Answer 5

• an extra shell is added (increasing the element size)
• the outer electron is held in place by an electrostatic force/ attraction between the electron and the nucleus
• the larger the distance between the outer electron and the nucleus, the less force the electron ‘feels’ and so it’s lost easier= more reactive