Question

guyssss fast .........​

Answer 1

1 have same shell

2. Except for lithium and beryllium all are non metals

3. Decreases as u go from left to right

Answer 2

1) atoms of different elements with same number of occupied shells are placed in the same period

2) non metals -carbon, nitrogen, oxygen, fluorine and neon

3) atomic radius decreases in moving from left to right across a period. This is due to an increase in nuclear charge which tends to hold the electrons closer to the nucleus and hence reduces the size of the atom