Question

2.
Tick True or False in the following statements:
(i) Mendeleev put forward his periodic law in 1856.
The first period contains two elements, hydrogen and hellium.
The longest period in the periodic table is 7th period.
(iv) Lanthanides and Actinides are d-block elements.
75​

Answer 1

Explanation:

True

True

False

True

tq

Answer 2

Answer:

True

True

False

True

Explanation:

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