Question

A. Fill in the blanks.

1. Materials made up of same kind of particles are called .

2. The type and number of particles of each kind present in a substance is given

by its .

3. The chemical formula of water is .

4. Iron gets rusted on coming in contact with and

.

5. The process that leads to a chemical change is called a .

6. In a neutralisation reaction, and are formed.​

Answer 1

Explanation:

• An element. An element is a substance that is made up of only one type of atoms.
• The type and number of particles of each kind present in a substance are given by its atoms. Explanation: Atoms are known to be the smallest building blocks of matter.
• H2O
• oxygen and water.
• Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
• A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7. ... Table 1: The most common strong acids and bases.