Question

showing the atomic mass of elements, molecular masses, electronic configuration and valene

Answer 1

atomic mass shows the sum of no.of protons+neutrons,
for eg
sodium =protons(11)+neutrons(12)=23amu

molecular mass is the sum of atomic mass of elements present in one moleculen.
eg,
O2=16+16=32amu

electronic configuration shows how electrons placed in an atom.
eg,
Na(sodium)=2,8,1 it shows there are 3 shells in Na K,L,M ,respectively.

valance electrons shows unpaired electrons in last shell of anatomy,
eg,
Na has only 1 electron

if u like mark as brainliest

Answer 2

atomic mass represents sum of protons and neutrons.

molecular mass represents sum of atomic mass of elements that are present in 1 molecule.

Electronic configuration represents how the electrons are placed in an atom.

valency represents the number of unpaired electrons in last shell