Sort the following properties into those characteristic of a metal, and those typical of a
non-metal.
is an insulator can be beaten into sheets
gives a ringing sound when hit conducts heat
has a dull surface
conducts electricity

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.

answer; talc and gypsum;

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8