four protons and 5 neutrons in Be-9
Zinc has 30 protrons, 36 neutrons, and 66 electrons
there are 11 neutrons.
It has 26 protons and 30 neutrons
1 proton, no neutrons
7 protons and 7 neutrons
How many protrons and neutrons does silicon have in the nucleus?
Lithium has 3 protons and typically 4 neutrons in its nucleus.
The most important isotope of beryllium - 9Be - has 5 neutrons. The neutral atom of beryllium has 4 electrons.
Beryllium 9 has 5 electrons.
All I know is that Mercury has 80 protons.
Any atom with 4 protons is an atom of beryllium. If the atom is neutral, it must also have 4 electrons. However, 5 neutrons specifies an isotope, specifically Be-9, rather than an element as such.
Electrons, Neutrons, and Protrons