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Because that is the number of protons in its nucleus. This is also equal to the number of electrons in its orbits.

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Q: Why the atomic number of beryllium is 4?
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Related questions

What is the atomic number of berryllium?

The atomic number of Beryllium is 4.


What is the atomic number of berryilium?

The atomic number of Beryllium is 4.


What is the atomic number of berllium?

The atomic number of beryllium is 4.


What is atomicity of beryllium?

The atomic number of beryllium is 4. Be is a monoatomic metal.


What is the lightest element in the beryllium family?

Beryllium for it has a Atomic Number of 4.


Which atom had the atomic number 4?

Beryllium


How many negative charges are in beryllium?

A neutral atom of Beryllium has 4 electrons. (Its atomic number is 4)


What is the atomic number of a beryllium?

The atomic number of Beryllium is four, which is also the number of protons.


What is the mass and the atomic of Be?

Beryllium (Be) has the (weighted) atomic mass of 9.0121831 grams. The atomic number is 4.


Alkaline earth metals atomic number 4?

Beryllium ( Be)


How many protons are in the nuclear of an beryllium?

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.


What is the symbol for the element beryllium?

Beryllium is an alkaline earth metal. It has an atomic number of 4. By looking at this spot on the periodic table, one finds that beryllium has the atomic symbol Be.