Question

An elements has the electronic configuration 2, 8, 7 answer the following questions.
a) What is the atomic number of this element? b) To which period does this element belong? c) What is the group this element? d) State whether it is metal as non metal. e) What is the valency of this element?​

Answer 1

Answer:

answer ok b

ok byr good night out

Answer 2

a) atomic number = 17

b) 3rd period element

c) 17th group element

d) non metal

e) 1 is the valency