Protons, neutrons and
Assuming the following element is neutral, it will have
electrons.
12
Mg
Magnesium
24.305
012, 12, 12
24, 24, 24
12, 24, 12
12, 12, 24

Assuming the element Magnesium atom is neutral

Proton #  = 12

Neutron # = 12

Electron # = 12

Explanation:

In a neutral atom the number of protons and electrons is always equal

The atomic number tells the number of protons (12) in this case

The Atomic Mass describes the mass of the protons + mass of neutrons, so if you take 12 (number of protons) away you are left with 12 and some change(number of neutrons)

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.