What element has an atomic number of 5 and a mass number of 12?
Table of Contents
What element has an atomic number of 5 and a mass number of 12?
The elements of the periodic table sorted by atomic mass
| Atomic Mass | Name chemical element | number |
|---|---|---|
| 6.941 | Lithium | 3 |
| 9.0122 | Beryllium | 4 |
| 10.811 | Boron | 5 |
| 12.0107 | Carbon | 6 |
What is the atomic number of HE 5?
2
List of isotopes
| Nuclide | Z | Isotopic mass (Da) |
|---|---|---|
| 5 He | 2 | 5.012057224±0.000021470 |
| 6 He | 2 | 6.018885889±0.000000057 |
| 7 He | 2 | 7.027990652±0.000008115 |
Why is Boron’s atomic number 5?
Definition: Boron is the element with atomic number 5. Each boron atom has five protons in its nucleus (atomic core), and five electrons.
How many electrons does helium-5 have?
2 electrons
Protons, Neutrons, and Electrons 5. A helium atom has 2 protons, 2 electrons and a mass which is about 4 times that of a hydrogen atom. How many neutrons must be present in the nucleus of a helium atom to account for its mass?
What is element 5 in the periodic table?
Boron
Boron – Element information, properties and uses | Periodic Table.
What family has 5 valence electrons?
nitrogen family
Atoms in the nitrogen family have 5 valence electrons. They tend to share electrons when they bond. Other elements in this family are phosphorus, arsenic, antimony, and bismuth.
What are 5 protons in the nucleus of an atom?
The only atom that has 5 protons is Boron.
What is the atomic mass of 5 protons?
A boron atom has 5 protons and 5 electrons. Its average atomic mass is 10.81. Natural boron consists of a mix of two stable isotopes: boron-10 and boron-11. Eleven isotopes, with masses 7 to 17 are known.
What is the atomic number of fluorine?
9
Fluorine/Atomic number