23 июл. 2023 г. · The element with 2 neutrons, 2 electrons, and 2 protons is helium (He). To find the mass number, we need to add the number of protons and neutrons. How many electrons does a helium atom have if it has 2 ... Why does helium have two protons but no neutrons? - Quora If helium has an atomic number of 2, how many electrons does ... Why does an atom with two protons and two neutrons not exist? Другие результаты с сайта www.quora.com

21 окт. 2023 г. · The element that has 2 protons and 2 neutrons in its nucleus is helium. Helium is the second lightest and second most abundant element in ...

3 июл. 2022 г. · One atom of Helium has 2 electrons, 2 protons and 2 neutrons. Calculate the atomic number and mass number of Helium. ​

27 окт. 2020 г. · Helium has 2 protons, 2 electrons, and 2 neutrons. Therefore, the atomic number of helium is 2.The atomic number of an element determines the element's place ...

An element with 2 protons and 2 neutrons would have an atomic number of 2 and an atomic mass of 4, which corresponds to Helium.

Most Helium atoms have two neutrons in addition to the protons. In its neutral state, Helium has two electrons in orbit about the nucleus. Helium nucleus.

14 янв. 2019 г. · Consider helium again. Most helium atoms have two neutrons in addition to two protons. Therefore the mass of most helium atoms is 4 atomic mass ...

Nitrogen, 7, 7, 7, 2 ...

30 нояб. 2016 г. · If the atom contains 2 protons, 2 positively charged nuclear particles, then Z=2 , and the element is helium by definition.