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What is the mass number of a helium atom that has 2 protons and 2 neutrons?
Wiki User
∙ 6y ago
Number of neutrons = Mass number - Number of protons = 4 - 2 = 2 neutrons
Wiki User
∙ 11y ago
Wiki User
∙ 11y ago4
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If an atom were to have two protons then it would?
It would by definition be Helium (atom number = number of protons = 2) but the nucleus of the stable isotope 4He also contains 2 neutrons (the mass number = total number of p's and n's = 4)
What is an atom with two neutrons protons and electrons?
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.
What does an atom of 2 protons 2 neutrons and 2 electrons make?
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.
Why does helium have an atomic number of 2 and atomic mass of 4?
An atom's atomic weight is the total of all protons and neutrons in its nucleus. Helium almost always contains two protons and two neutrons. Therefore, its atomic weight is 2 + 2 = 4.
The nucleus of a helium atom contains four subatomic particles how many neutrons does the helium atom have?
Helium has two neutrons and two protons in its nucleus.
Why is the atom of a helium atom unchanged adding one neutron to it?
The number of protons determines the element. So when neutrons are added, there is no change in the number of protons and helium atom is unchanged.
If an atom were to have two protons then it would?
It would by definition be Helium (atom number = number of protons = 2) but the nucleus of the stable isotope 4He also contains 2 neutrons (the mass number = total number of p's and n's = 4)
What is the Mass number of helium atom that has two protons and two neutrons?
4 because the mass number equals protons plus neutrons. Which is 4.
What is an atom with two neutrons protons and electrons?
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.
What does an atom of 2 protons 2 neutrons and 2 electrons make?
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.
Why does helium have an atomic number of 2 and atomic mass of 4?
An atom's atomic weight is the total of all protons and neutrons in its nucleus. Helium almost always contains two protons and two neutrons. Therefore, its atomic weight is 2 + 2 = 4.
What is the protons neutrons and electrons of helium?
The number of protons in an element is always the same as the atomic number, which is 2 in the case of helium. (The atomic number is assigned based on the number of protons in an element.) In a neutral atom (one with no charge), the number of electrons equals the number of protons, so it will be 2 electrons also. However, the number of neutrons will vary depending on the isotope (atoms of the same element with different numbers of neutrons). There are two stable isotopes of Helium, 3He and 4He, having 1 neutron and 2 neutrons respectively. Most helium is helium-4, and helium-3 is found as only about one atom in a million.See link below for more information on Helium, as well as the related question below that will show you how to find the number of protons, neutrons, and electrons in any atom.
What is the atomic number o an atom that has 2 protons and 3 neutrons?
2 (helium). With 3 neutrons it would be Helium-5 which is the most unstable radioisotope of helium.
What atom has two protons and two neutrons?
It is helium, specifically the helium-4 isotope, that is composed of two protons and two neutrons.
What is a Nucleus of a helium atom?
The nucleus of a helium atom contains two protons and two neutrons.
The nucleus of a helium atom contains four subatomic particles how many neutrons does the helium atom have?
Helium has two neutrons and two protons in its nucleus.
What atomic particle has two protons and two neutrons?
Any atom with two protons has an atomic number of two and is an isotope of helium. With two neutrons, there are a total of nucleons is four, so the isotope or mass number is four (sum of protons plus neutrons). Therefore the atom is helium-4 or 4He, which is stable (not radioactive) and the most common isotope of helium in nature, account for nearly 100% of all helium.
