What is the mass of a 4He nucleus?

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The discussion centers on understanding the notation "4He," which refers to the Helium-4 isotope, characterized by having two protons and two neutrons. The mass of the Helium-4 nucleus is given as 6.4 x 10^-27 kg. Participants clarify that this mass can be directly attributed to 4He, confirming that the mass of Helium-4 is indeed 6.4 x 10^-27 kg. The conversation highlights a lack of recent chemistry knowledge from one participant, who primarily studies physics, and seeks assistance in grasping these concepts.
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NOT A HOME WORK PROBLEM

what does the following means.

4He

and it says that a He nucleus has mass of 6.4*10-27 Kg

how would i calculate the mass of 4He

do i take mass of 4He to be 6.4*10-27 Kg?

help, haven't done chemistry after getting out of school..i only do physic..in uni

thanks in advance
 
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4He means Helium-4, the Helium isotope with atomic number 4 (two protons, two neutrons). As opposed to Helium-3 (two protons, one neutron) for instance.
 
i see thanks for the help
 

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