Question

observe the given table answer the following question

element. A B C D E
atomic no 11 4 2 7 19
identify the two element that element that belongs to the same periodic give reason for your conclusion​

Answer 1

Answer:

A and E

Explanation:

Because A has atomic number 11 then electron situated in orbits like 2,8,1

E has atomic number 19 then electron situated in orbits like 2,8,8,1

both has 1 electron in last orbit