Group 1 elements

Question 1

group 1 metals are also known as…

Answer 1

alkali metals

Question 2

list all group 1 elements in order

Answer 2

lithium 
sodium
potassium
rubidium 
ceasium
francium

Question 3

lithium physical properties

Answer 3

2:1 structure
0.53g/cm^3
181ºC melting point
1324ºC boiling point
fairly soft

Question 4

sodium physical properties

Answer 4

2:8:1 structure
0.97g/cm^3
98ºC melting point
883ºC boiling point
soft

Question 5

potassium physical properties

Answer 5

2:8:8:1 structure
0.86g/cm^3
63ºC melting point
760ºC boiling point
very soft

Question 6

describe reactivity down the group

Answer 6

the reactivity increases down the group

Question 7

describe the melting/boiling points and hardness down the group

Answer 7

melting and boiling points decrease down the group and the elements get softer and softer down the group

Question 8

observations of lithium reacting with water

Answer 8

fizzes slowly with few bubbles
disappears slowly
moves slowly on the surface
remains solid with no flames

Question 9

observations of sodium reacting with water

Answer 9

fizzes quickly with more bubbles
disappears quickly
moves quickly on the surface
melts into a liquid ball with no flames

Question 10

observations of potassium with water

Answer 10

fizzes violently with many bubbles
disappears very quickly
moves very fast on the surface
melts into a liquid ball with a violent flame

Question 11

what are the products of group 1 metals and water

Answer 11

hydrogen gas is formed and a grp1 metal hydroxide

Question 12

what is the equation for sodium and water

Answer 12

2Na(s) + 2H20(l) —-> 2NaOH(aq) + H2(g)