Beryllium has two electron shells.
The atomic number of an atom tells you how many protons that atom has. Beryllium's atomic number is 4. That means that, regardless of how many neutrons a given isotope of beryllium may have, it will always have 4 protons.
A beryllium atom without electrical charge.
A neutral atom of Beryllium has 4 electrons. (Its atomic number is 4)
The most important isotope of beryllium - 9Be - has 5 neutrons. The neutral atom of beryllium has 4 electrons.
4 protons.
There are four protons in the nucleus of a beryllium atom.
Beryllium is an atom / element.
Only two electron shells.
Electronic configuration of beryllium: 1s2.2s2.
A beryllium atom has 4 electrons.
An atom of beryllium.
Only two electron shells.