Question

EXCERO
1. (a) State the modern periodic law.
(b) How many periods and groups are there in the modern
periodic table ?​

Answer 1

Answer:

Identify the mismatched pair(s) from the following:

i) Oedogonium – Micro-arthropod

ii) Daphnia – Algae

iii) Vorticella – Protozoa

iv) Asperigillus – Fungi

Answer 2

Answer:

(a) Modern periodic law states that the physical and chemical properties of elements are the periodic functions of their atomic number.

There are 18 groups and 7 periods present in the modern periodic table.