23 июл. 2023 г. · The nucleus of a helium atom contains two protons and two neutrons, and the helium atom has two electrons. So, it's Helium with mass number 4. How many electrons does a helium atom have if it has 2 protons and ... If helium has an atomic number of 2, how many electrons does it ... If a hydrogen atom has 1 proton, 2 neutrons and 2 electrons ... - Quora If a hydrogen atom has 1 proton and 1 electron, and a ... - Quora Другие результаты с сайта www.quora.com

3 июл. 2022 г. · The correct option is A. Atomic number = 2​. Mass number = 4​. Atomic number is the number of protons in the atom. Mass number is the sum of ...

27 окт. 2020 г. · Helium has an atomic number of 2. This number also means that helium has 2 protons. The atomic mass of helium is 4. How many neutrons does ...

22 авг. 2022 г. · Final answer: The element described is helium with a mass number of 4 and a net charge of 0. Symbol is He. Explanation:.

Helium is composed of two electrons, two protons, and usually two neutrons. Helium is an atom whose atomic number is 2 and whose mass number is 4. Helium is ...

8 сент. 2024 г. · In this case, there are 2 protons and 2 neutrons, which gives a total mass number of 4 (2 protons + 2 neutrons = 4). - **Electrons**: Since it ...

The symbol of an atom is He, and the number of electrons and protons is 2, 2. The mass number is 4, and the atomic mass is 4.0026 u.

a. 2 protons, 2 neutrons, and 2 electrons b. 4 protons, 5 neutrons, and 4 ... The mass number is equal to the number of protons plus the number of neutrons.

The atomic number of an atom is equal to the number of protons in its nucleus. Therefore, the atomic number of a helium atom is 2.