Reactions of Period 3 Elements Reactions with oxygen

Question 1

sodium chemical formula, reaction conditions , reaction , flame , product

Answer 1

4Na(s) + O2(g) → 2Na2O.(s)
heated

vigorous reaction

flame is bright yellow

product is white solid

Question 2

magnesium chemical formula, reaction conditions , reaction , flame , product

reacted with oxygen

Answer 2

2Mg(s) + O2(g) → 2MgO.(s)

heated

reaction is vigorous

flame is bright white

product white solid

Question 3

aluminium

chemical formula, reaction conditions , reaction , flame , product

reacted with oxygen

Answer 3

4Al(s) + 3O2(g) ~ 2Al2O3(s)

reaction conditions powdered aluminium

reaction is fast

flame is bright white

product white powder

Question 4

Silicon

chemical formula, reaction conditions , reaction , flame , product

reacted with oxygen

Answer 4

Si(s)+O2(g) ~ SiO2 (s)

reaction conditions powdered Si heated strongly

reaction is slow

flame is bright white sparkles

product white powder

Question 5

Phosphorus

chemical formula, reaction conditions , reaction , flame , product

reacted with oxygen

Answer 5

4P(s) + 5O2(g) ~ P4O10(s)

reaction conditions heated

reaction vigorous

flame is yellow or white

product white cloud

Question 5

Sulphur

chemical formula, reaction conditions , reaction , flame , product

reacted with oxygen

Answer 5

S(s) + O2(g) ~ SO2(g)

Powdered sulphur heated gently

reaction is gentle

flame is a blue flame

product toxic fumes