Question

Describe two characteristics of an element. Write symbols of any two elements​

Answer 1

Answer:

oxygen- the symbol is O . it has valency 2 .

• oxygen is necessary of all human and animals
• it is also used to make acid or to take part in any reaction

Nitrogen- the symbol is N. it has valency 3.

• it is used to make nitrates
• it is also used to make amonium .