Question

an element it has 17 protons and 18 neutrons a) find e , a ,z b)find it valency c) Name the element d)it formula with protons​

Answer 1

Answer:

a) e = no. of electrons = no. protons = 17

a = mass number = no. of protons + no. of neutrons = 17+18 = 35

z = atomic number = no. of protons = 17

b) its valency = 1 as it has 7 electrons in its outermost shell. so it will extract one electron

c) the element is chlorine