# The mass number of an atom can be calculated from

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To find the number of neutrons in an atom, you would subtract

A.) mass number from atomic number
B.) atomic number from mass number
C.) atomic number from electron number
D.) isotope number from atomic number

To find the number of neutrons in an atom, what we must do is to follow the following steps:

1) Find the element in the periodic table.

2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.

3) Find the atomic weight of the element.

4) Finally, we look for the number of neutrons. For this, we follow the following relationship:

Atomic weight - number of protons = number of neutrons.

To find the number of neutrons in an atom, you would subtract:

B.) atomic number from mass number

## The mass number of an atom is the number of

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The atomic number is the number of protons in the nucleus of an atom of an element. Each element has a unique number of protons. For example, an atom with …

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## Calculate the number of atoms of each type in c12h22o11

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2. A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g. a. Calculate the number of moles of C12H22O11 contained in the sample and record in Table …

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Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%). Show your work.

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Calculate the mass, in grams, of a single silver atom (mag = 107.87 amu ).

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Why isn’t the atomic mass always a whole number?

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## Select the acceptable sets of quantum numbers in an atom.

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## Isotopes of the same element have the same mass number

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The mass number of an element is equal to ____. a. the total number of electrons in the nucleus b. the total number of protons and neutrons in the nucleus …

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