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81. Simply add them together. 43 + 38 = 81.

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10y ago
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13y ago

Protons = electrons =31

mass= protons+neutrons=69

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14y ago

81: Simply add the two numbers.

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13y ago

70 units

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11y ago

31 protons

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Q: What is the mass of a neutral atom with 31 electrons and 38 neutrons?
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Related questions

What is the number of electrons and neutrons in fluorine?

In a neutral atom of fluorine, there are 9 electrons. The number of neutrons varies with an isotope's mass number.


What is a neutral stable atom with a mass of 8?

The mass number is the number of protons and neutrons added together. Electrons are not counted as part of the mass because while protons and neutrons weigh the same, Electrons weigh virtually nothing compared to them. As far as I can tell, there is no stable atom with a mass of 8.


If a neutral atom has a mass of 15 amu and an atomic number of 7 whats the number of protons neutrons and electrons in the atom?

The protons is 7, the neutrons is 8, and the electrons is 22.


If a neutral atom has a mass of 12 amu and an atomic number of 5 determine the number of protons neutrons and electrons in the atom.?

Protons: 5 Neutrons: 7 Electrons: 5


How many neutrons are in meitnerium?

Number of neutrons = Atomic mass of an isotope - Atomic number of the element The atomic number of meitnerium is 109. Each isotope of an element has a different number of neutrons.


How many protons neutrons and electrons are in a neutral atom of neon if its atomic number is 10 and its mass number is 22?

10 protons, 10 neutrons, 12 electrons


How many electrons belong to a neutral atom with an atomic mass of 36 amu?

A neutral atom with an atomic mass of 36 amu will have 36 electrons. This is because the atomic mass of an atom is determined by the sum of its protons and neutrons, and in a neutral atom, the number of electrons is equal to the number of protons.


What is the difference between atomic mass?


What is bigger an atom number or a mass number?

Atomic number = number of protons or electrons (in a neutral atom) Mass number: sum of protons and neutrons The mass number is bigger.


What particles are used to determined the mass of an atom?

Mass of an atom = mass of protons + mass of neutrons


The atomic mass of an atom is 46 and it has 22 neutrons. How many electrons does it have?

46. That answer is incorrect. If the atom has 22 neutrons, then it must have 24 protons to make up the total mass of 46. A neutral atom always has the same number of electrons as protons so the correct answer is 24.


A neutral atom of gold has a mass number of 197 and has 118 neutrons how many electrons does it have?

Any neutral atoms has the same number of electrons as protons, and any atom has a number of protons equal to the difference between its mass number and neutron number. Therefore, this atom has 197 - 118 = 79 electrons.