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Must the number of electrons in an atom equal the number of neutrons?
Wiki User
∙ 11y ago
Neutral atoms do, but ions (atoms with charges) by definition do not.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoAn Atom is neutral. 0 charge
Proton = +1 charge
Neutron + 0 charge
Electron = -1 charge
to be neutral. total charge = 0
# of protons = number of electrons
Wiki User
∙ 11y agoNo. Not at all. The number of neutrons equals the number of protons in a normal atom, however.
Wiki User
∙ 11y agoYes
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Consider the silicon 29 isotope How many protons and neutrons and electrons will it have?
All silicon atoms have 14 electrons and 14 protons. That is a rule that every silicon atom must follow. On the periodic table, the number next to the atom is the number of electrons/protons in an atom (silicon is the 14th element listed on the periodic table, hence the 14 electrons and 14 protons). The number "29" is the number of protons and neutrons together. This number can change with changing isotopes. So, if every silicon atom must have 14 protons, and 29 is the number of protons and neutrons together, so the number of neutrons must be 29 minus 14. Final: 14 protons 14 electrons 15 neutrons
What is the mass number of an ion with 107 electrons 159 neutrons and a plus 1 charge in integer form?
If the ion has a +1 charge and has 107 electrons, that means that it originally had 108 electrons, and therefore has 108 protons. The mass number is the sum of the protons and neutrons, 108 + 159, and therefore is equal to 267.
Calcium has an atomic mass of an atomic number of 20 so the number of neutrons must be?
The number of neutrons is different for each isotope of an element: Number of neutrons of an isotope = atomic mass of the isotope - atomic number of the element Calcium has also 20 protons and 20 electrons.
How many protons neutrons and electrons are there in sulfur?
There are 16 protons, 16 neutrons and 16 electrons in a Sulfur atom. *note it's atomic number- this is the number of protons in an atom of an element. There must be the same number of electrons to balance the charge. The atomic weight minus the number of protons gives you the number of neutrons
Which subatomic particles have mass and re included in the calculation of the atomic mass number?
These particles are protons and neutrons; but to be correct the mass of electrons must be added.
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 in an atom must equal the number of neutrons?
No. For an atom to be neutral (no charge, not an ion) the number of electrons must equal the number of protons. Usually the number of electrons is very close to the number of protons though.
Do neutrons always equal the number of elecrons?
Electrons are equal to the number of protons and the atomic number. To find the number of neutrons you must subtract the atomic number from the mass number.
A neutral atom has the same number of protons as it does neutrons?
no. an atom is made up of protons neutrons and electrons. protons have a charge of plus one electrons have a charge of minus one neutrons have no charge. therefore the number of protons and electrons must be equal (balancing the charges) for the atom to be neutral. ;)
Why must the number of protons and neutrons be equal?
The number of protons and neutrons is not equal. The equality is not a rule.
In a neutral atom the number of electrons equals the number of what?
The number of electrons should equal the number of protons, otherwise you have an ion.
Is the number of protons in the nucleus of an atom equal to the number of electrons in its outer rings?
Only for the isotope hydrogen-1. All other nuclei contain at least one neutron; the number of electrons present outside the nucleus is the same as the number of protons in the nucleus; and both protons and neutrons are nucleons. Therefore, in any nucleus except that of hydrogen-1, the number of nucleons in the nucleus is greater than the number of electrons outside the nucleus.
What does the atomic number tell you about the parts of the element?
The atomic number of an element tells you the number of protons and neutrons that element has. Since an atom has a neutral charge, the number of electrons must equal the number of protons, so you can also tell the number of electrons that element has.
What is the number of neutrons protons and electrons in an atom of zirconium 90 that has no overall charge and an atomic number of forty?
Atomic number gives the number of protons: 40. If the atom is neutral, it must have an equal number of protons and electrons. Therefore, the number of electrons is also 40. The isotope number is the same thing as the atomic mass. Atomic mass is basically the sum of protons and neutrons. Therefore, subtracting the number of protons from the atomic mass yields the number of neutrons: (90 - 40 = 50). Thus, there are 50 neutrons.
How many protons electrons and neutrons are there in an atom that has an atomic number of 8 and a mass of 15?
Learn that the atomic number means the number of protons. The mass number is the number of protons and the number of neutrons. So if we take the number of protons from the mass number then we get the number of neutrons that are present (mass umber - atomic number = number of neutrons). in this case 15 - 8 = 7. Since you dont mention there is any charge on the atom ill assume that its charge is neutral. For an atoms charge to be neutral then the positive charges from protons must equal the negative charges from electrons and vica versa. So for this to be the case with 8 protons then we must have 8 electrons.
If an atom contains 15 protons it must contain?
Any atom should have equal number of protons and electrons. If the atom contains 15 protons then it must contain 15 electrons.
How can the number of protons electrons and neutrons be calculated when giving the mass number?
The atomic number must be known along with the mass number. Then the number of protons or electrons is the same as the atomic number, and the number of neutrons is the difference between the mass number and the atomic number.
