Question

Here are the formulae of four substances.

MgSO₄ , H₂O , N₂ , O₂

a) Name the element that occurs in three of these substances.
b) Name the element present in these substances that is metal.
c) Give the chemical symbols for magnesium and hydrogen.
d) List the types and numbers of the atoms in one molecule of H₂O.

Answer 1

Answer:

a) O- Oxygen

b) Mg- Magnesium

c) Magnesium-- Mg ,, Hydrogen-- H

d) 2 types of atom and 3 no. of atoms

Answer 2

a. O --> oxygen

b. MgSO4 --> Magnesium sulfate in which magnesium is metal..

c. For magnesium (Mg) & hydrogen (H)

d. No of atoms:- 3 ,

Types of atoms:- 2 ( hydrogen = 2 , oxygen = 1)

Mr.professor ...