Question

a(4) b(9) c(19) d(20) now pls tell the element that has one electron in the outermost shell also write electronic confrigution. of element​

Answer 1

Answer:

the element which one electron in its valence or outermost shell is c(19).

Explanation:

electronic configuration

2,8,8,1

Answer 2

Answer:

electronic configuration

a{2,2}

b{2,7}

c{2,8,8,1}

d{2,8,8,2}

option 'c' has the one electron in its outermost shell...

hope it helps