Protons: 12
Neutrons: 13
<span>Electrons: 12</span>
Answer:
mass and occupies space
Explanation:
matter is made up of mass and mass takes up space
Answer:
A- beryllium
B- calcium
C- magnesium
Explanation
NOTE: all element in group 2 have 2 balance electrons
First let’s start with B- number of electrons= number of protons which is equal to the atomic number. therefore, the answer is calcium as it’s atomic number is 20
C- magnesium will have three energy levels considering it has 12 electrons (2,8,2).
A- beryllium is the lightest one in group 2 as it has the atomic mass of 9.0122.
Answer:
Any matter considered to be a fuel contains chemical energy
Energy has to be provided to initiate the reaction.
So yes. It is
B.
Isotopes is an atom has same number of electrons and protons but different number of neutron.
