Question

Questions from ESB Examinations
000
(a) State the number of elements in period 1. period 2, and period 3 of the periodic table.
(b) Name the elements in period 1.
(0) What happens to the atomic size of elements on moving from left to right in a period
(a) What is the common feature of the electronic configurations of the elements at the end
(b) If an element is in group 7 (or Group VIIA), is it likely to be metallic or non-metallic inch
(c) Write the missing word from the words given in brackets.
If an element has one electron in its outermost energy level (shell), then it is likely to
non-metallic).
ppy and complete the following sentences choosing the correct word or words from those
e end of each sentence:
The properties of the elements are a periodic function of their
(atomic
atomic mass).​

Answer 1

Answer:

a) in period 1 there are 2 elements ,in 2 period 8 elements and in p 3 there are also 8

b) hydrogen and helium

c) atomic size remains same