chemistry

Which is a Alkali metal

• (Rb)

• (Sc)

• (Ne)

• (Al)

How does lithium react with water?

• Turns into a lilac flame

• dissolves and turns yellow

• large amount of heat and melts

• doesn't melt with slow reaction

sodium atomic number

• 3

• 4

• 2

• 6

what is metalic bonding

• metals that will react with oxygen to form oxides

• the bonding between metals like (B) and (Ne)

• the electrostatic forces of attraction between positive ion and delocalized electrons

• the electrostatic forces of positive and negative ions releasing atoms

what is the atomic number of (Rn)

• 47

• 56

• 73

• 86

Electronic Configuration of (Cs)

• 2,8,8,8,8,2

• 2,8,8,8,1

• 2,8,8,8,8,8,8,5

• 2,8,8,8,8,7

what is the last reactivity metal in the reactivity series

• Gold

• Silver

• Copper

• Platinum