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The number of neutrons plus protons in the nucleus of an atom-?

nass number is the number of neutrons plus protons in the nucleus of an atom


Does the number of neutrons equal the mass number?

no, the mass number is number of protons in an atom, plus the number of neutrons.


How do you determine the atomic mass number of any atom?

protons plus neutrons


What is the number of neutrons plus the number of protons?

The number of neutrons plus the number of protons gives you the approximate atomic mass of an atom in atomic mass units. The actual mass varies due to nuclear energy and the mass-energy equivalence demonstrated by Einstein's E=mc^2.


What is the mass number of a atom?

the mass number is number of protons in an atom, plus the number of neutrons.


How many neutrons does Na plus have?

Sodium typically has 12 neutrons in its most common isotope, sodium-23. When sodium loses an electron to form the Na+ ion, it still has the same number of neutrons due to the neutral nature of neutrons.


How does a helium atom have neutrons in if it is made from hydrogen atoms fusing and hydrogen does not have neutrons?

The weak interaction is capable of converting protons into neutrons plus anti-electrons.


What mass number is calculated by adding the numbers?

the mass number of an atom is the number of protons in an atom, plus the number of neutrons.


What is the number for mass?

the mass number is number of protons in an atom, plus the number of neutrons.


The mass number of an atom indicates the number of what?

The mass number is the sum of protons + neutrons.


What is the mass number of a zinc atom that has 37 neutrons?

The mass number of an atom is the sum of its protons and neutrons. For a zinc atom with 37 neutrons, the mass number would be the number of protons (30 for zinc) plus the number of neutrons (37), which equals 67.


Why does Rb have a greater atomic radius than K?

A potassium atom has 19 protons and 19 electrons, plus 20-22 neutrons. A rubidium atom has 37 protons and 37 electrons, plus 46-50 neutrons and so is bigger.