Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The properties of the elements are a periodic function of their __________.
an element has an atomic number 16. State
- the period to which it belongs
- the number of valence electrons
- whether it is a metal or non-metal
An element Z has atomic number 16. Answer the following
(a) State the period and group to which Z belongs
(b) Is Z a metal or a non-metal?
(c) State the formula between Z and hydrogen.
(d) what kind of a compund is this?
State whether the following statement is true or false
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
Explain, the statement 'In each period, the atomic radii gradually decrease with increase in atomic number'. Give one example to justify your answer.