How many protons neutrons and electrons are in 4 2 He

42He is a helium isotope with 2 protons, 2 neutrons, and 2 electrons. The atomic number of helium is 2, which means it has 2 protons in its nucleus. The mass number of 42He is 4, which means it has 2 neutrons in its nucleus. The number of electrons in an atom is equal to the number of protons, so 42He has 2 electrons.

What is the atomic number of helium? 2
What is the mass number of 42He? 4
How many neutrons are in 42He? 2
How many electrons are in 42He? 2
What is the chemical symbol for helium? He

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How many protons, neutrons, and electrons are in 42He?

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