2 simple questions about periodic table...
hello can some one help me to answer these 2 questions...
1.how many unpair electrons are there in the Cr+3 ion?
2.Two particles have the followinf composition:
A 37 protons; 38 neutrons; 37 electrons
B 37 protons; 40 neutrons; 37 electrons
a) what is the relationship between these particles?
b) these two particles have very similar chemical properties. Explain why.[/sup]