Question

Q2. Fill in the blanks

1. There are 7 __________ and 18 __________ in the modern period table.


2. During oxidation of ammonia _________ acts as the catalyst.

3. Electrolytic ___________ of water to hydrogen and oxygen is called ___________.


4. __________ is the hardest naturally occurring substances.​

Answer 1

Answer:

1. 7rows and 18 columns

2.molybdenum

3. called electrolytic decomposition reaction

4.diamonds