Answer:
From Middle school to college
Answer:
Symbol Be
atomic number 4
protons 4
neutrons 5
electrons 4
ion charge +2
Explanation:
Look at the periodic table and all the answers can be found there. If you would like to learn how to find them please message me below.
Im assuming, if you find rare earth elements, it is important to the technological world bc you can make more products more better, and even invent new and more modern things.
The answer to this question is 5
The atomic number is 9 Ions have the same atomic number since atomic number signifies number of protons not electrons
