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The number of neutrons in an atom is the number of protons subtracted from the mass number. For instance Carbon weighs 12.01 amus and has 4 Protons, therefore it has 8 neutrons because protons and neutrons make the mass of an atom since electrons weigh such a small amount.
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What is equal to the total number of protons and neutrons?
If you add the number of protons to the number of neutrons in an atom, you have calculated that atom's atomic mass.
The mass number of an atom is equal to what?
The mass number of an atom is equal to the sum of its protons and neutrons. It is represented by the letter "A" in the chemical symbol notation, where A = number of protons + number of neutrons in the nucleus of the atom.
What is the mass number of an atom equal to?
The mass number of an atom is equal to the number of protons and neutrons that are in the nucleus of the atom. Atoms are the basic units of a chemical element.
What number of protons and neutrons must be contained in the nucleus to result in a neutral atom?
For a neutral atom, the number of protons (which determines the element) must be equal to the number of electrons. This means that the number of protons should be equal to the number of electrons for the atom to be neutral. Neutrons have no charge, so the number of neutrons does not affect the overall charge of the atom.
What equal to the number of protons and neutrons in an atom?
mass number
Is the mass number of an atom equal to the atomic number?
Only if the atom is hydrogen-1! The mass number of the atom is equal to the sum of the numbers of protons, which is the same as the atomic number, plus the number of neutrons. The only non-radioactive atom without neutrons is hydrogen-1.
What is the sum of protons and neutrons in an atom?
Mass number!:)
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.
Why is the number of protons equal to the number of electrons in an atom?
To maintain the neutrality of an atom the number of neutrons must be equal to number of electrons; in ions this number is not equal.
Is the number of electrons equal the number of neutrons in an atom?
not usually, a standard atom will contain the same amount of electrons and PROTONS, not neutrons
What subunits are present in equal numbers in an atom?
Protons, neutrons, and electrons are subunits present in equal numbers in an atom. The number of protons in an atom is equal to the number of electrons, while the number of neutrons can vary in different isotopes of an element.
What best describes the number of neutrons in an atom?
It is equal to the difference between atomic number and Atomic Mass number. A+
