Question

an element has atomic number is 19. then find the group number and period number in the periodic table
​

Answer 1

Answer:

So according to this the element must be in period 4th period because it is having valence electrons in 4s. So the element with atomic no. 19 is in group 1st and period 4th.

hope is it correct

Answer 2

Explanation:

So according to this the element must be in period 4th period because it is having valence electrons in 4s. So the element with atomic no. 19 is in group 1st and period 4th.