There are several isotopes of Helium and they have different numbers of neutrons. The simplest and most common is Helium-4 which has two neutrons
If you build an atom using two protons, two neutrons and two electrons you would build an atom of Helium. To be more-precise, this would create Helium-4 the common isotope of Helium.
Helium has two neutrons and two protons in its nucleus.
The atomic mass of a helium atom is approximately 4 atomic mass units (amu). This value reflects the combined mass of its two protons and two neutrons, as helium has two protons in its nucleus and typically two neutrons. The mass of electrons is negligible compared to that of protons and neutrons, so it does not significantly affect the atomic mass. Thus, the expected atomic mass aligns closely with the sum of the nucleons in the helium nucleus.
A helium atom consists of 2 protons, 2 electrons and 2 neutrons.
If the atom has a balanced electrical charge, then # of protons = # of electrons, so the atom has 2 protons (Helium). The vast majority of Helium atoms have 2 neutrons.
If you build an atom using two protons, two neutrons and two electrons you would build an atom of Helium. To be more-precise, this would create Helium-4 the common isotope of Helium.
Helium has two neutrons and two protons in its nucleus.
2 (helium). With 3 neutrons it would be Helium-5 which is the most unstable radioisotope of helium.
The nucleus of a helium atom contains two protons and two neutrons.
The atomic mass of a helium atom is approximately 4 atomic mass units (amu). This value reflects the combined mass of its two protons and two neutrons, as helium has two protons in its nucleus and typically two neutrons. The mass of electrons is negligible compared to that of protons and neutrons, so it does not significantly affect the atomic mass. Thus, the expected atomic mass aligns closely with the sum of the nucleons in the helium nucleus.
A helium atom consists of 2 protons, 2 electrons and 2 neutrons.
If the atom has a balanced electrical charge, then # of protons = # of electrons, so the atom has 2 protons (Helium). The vast majority of Helium atoms have 2 neutrons.
In normal Helium(He) atom there are 2 electrons, 2protons and 2 neutrons.
The nucleus of a Helium atom contains two protons and two neutrons, protons and neutrons are measured in Daltons, and a Helium atom is about 4 Daltons
Helium is an element- the second one in the periodic table.
It is helium, specifically the helium-4 isotope, that is composed of two protons and two neutrons.
You subtract the atomic number from the atomic weight. For example, if you have a helium atom and its atomic weight is 4 and you subtract its atomic number (2) the number of neutrons in the helium atom is 2.