Answer the following:

CHEMISTRY · Multi-part · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Answer the following: (a) Define the terms: proton, neutron and electron. (b) An atom

X

has a proton number of

19

and relative atomic mass of

39

. - How many electrons, protons and neutrons are there in an atom of

X

? - How many electrons will there be in the outer energy level (shell) of an atom of

X

? - What is the electronic configuration of

X