How many protons dose Beryllium-9 have?

Answer 1

The element beryllium has an atomic number of four. All atoms of this Group 2 metal, regardless of which isotope we might consider, have four protons in their nucleus. And all beryllium atoms have a +4 nuclear charge.

Answer 2

Beryllium (Be), has an atomic number of four. This means that any Beryllium atom, ion, or isotope will have exactly 4 protons in its nucleus. If it does not have 4 protons in its nucleus then it is not Beryllium. Just like all atoms of Carbon (C) have 6 protons in its nucleus.

Although every Beryllium atom must contain 4 protons, its nucleus can contain varying numbers of neutrons. One Beryllium atom may have 3 neutrons in its nucleus while another may contain 4 neutrons and another may have 5 neutrons in its nucleus. These are called isotopes of Beryllium.

One way to describe which isotope is being dealt with is to write the elements' name, then a hyphen, and then the total number of protons and neutrons in its nucleus. In the case of Beryllium-9, the "9" indicates that the number of protons and neutrons in the nucleus add up to 9. So, how many of this 9 are protons? The answer is 4. As was first stated, all Beryllium atoms must have exactly 4 protons in its nucleus just as all Carbon atoms must contain exactly 6 protons.

When the 4 protons are subtracted from Beryllium-9, the result is 5. This number, which is 5, represents the number of neutrons in the nucleus of this Beryllium atom. Beryllium-7, an isotope of Beryllium, contains 3 neutrons in its nucleus after subtracting out the 4 protons that all Beryllium atoms have.

Answer 3

A beryllium atom, regardless of isotope, has 4 electrons.

Answer 4

Beryllium 9 has 5 electrons.

Answer 5

The atomic of berlium is 4

Answer 6

The atomic number of Beryllium is 4.

Answer 7

The atomic number of Beryllium is 4.

Answer 8

Beryllium-9 has 4 protons.

Answer 9

+4