Group 1 Flashcards
1
Q
Why are elements lower down group one more reactive
A
- atomic radius increases = electron in outmost shell is further away from the nucleus
- forces of attraction between the positively charged nuclei and -ve electron decreases
- The outermost electron is more easily lost, make it more reactive
2
Q
Describe the reaction of lithium with water
A
- fizzes
- slowly dissolves
- sits ontop of water
3
Q
Describe the reaction of sodium with water
A
- vigorous bubbling
- quickly moves around ontop of the water
- dissolves quickly
4
Q
Describe the reaction of potassium with water
A
- ignites when it touches the water = lilac flame
- sparks
- dissolves very quickly
5
Q
What solution to the group 1 elements produce when dissolved in water
A
A metal hydroxide solution which is an alkaline
6
Q
What gas is given off during the reactions of group 1 elements with water
A
Hydrogen gas
