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Does the sum of the protons in an atom equal the sum of the electrons?
Wiki User
∙ 10y ago
Protons minus neutrons doesn't mean anything in chemistry. Protons plus neutrons gives the mass number. Protons minus electrons gives you the charge of an atom(ion). The number of protons are equal to the number of electrons in a neutral atom and the proton number is equivalent to the atomic number.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoAs protons have a charge of 1 elementary charge and electrons have a charge of -1
So in a neutral atom protons will equal electrons.
But in ions (an ions is an atom or molecule that has a charge), the protons do not equal electrons.
Example:
Lithium atom - Li - 3 electrons and 3 protons - charge 0
Lithium cation - Li+ - (a fancy word for positive ion) - 2 electrons and 3 protons - charge of +1
Litium anion - Li- - (fancy word for negative ion) - 4 electrons and 3 protons - charge of -1
Note the number of protons cannot change as they are held together in the nucleus by a very strong force (called the strong force), and if they did move then it would no longer be the same atom.
Wiki User
∙ 10y agoWiki User
∙ 12y agoIn size of their charge, yes (except that their charges are opposite to each other).
In spin, yes.
But in no other property are they equal to each other.
Wiki User
∙ 14y agoThe electrons in and atom are the sum of it's protons and neutrons.
Wiki User
∙ 13y agoYes, if the atom is neutral then it will definitely have equal number of protons and electrons.
Wiki User
∙ 12y agoIn mass they are close but not exactly the same protons are bigger
In charge protons are positive and neutrons neutral
Wiki User
∙ 14y agoNo, the statement is false.
No. of electrons = Atomic no.
And Atomic Mass= No.of protons + no. of neutrons
Wiki User
∙ 13y agoNo, it is slightly greater.
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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.
Why an atom has no charge even though it contains charged particle?
There are particles within the atom that are charged. Protons have a positive charge, while neutrons have a neutral charge(in other words they have no electrical charge). If you take a look at the website below, the blue circles in the centre represent neutrons, with no charge, and the red circles are protons, with a positive electrical charge. The gray spheres orbiting around the nucleus(centre of the atom with most of the mass) represent electrons, which have a negative charge and weigh about 1/2000 of the mass of a proton/neutron. visitthis site http://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Stylised_Lithium_Atom.svg/180px-Stylised_Lithium_Atom.svg.png
If an atom has 35 electrons and its mass number is 80 calculate the number of protons?
In a neutral atom, the number of electrons will be the same as the number of protons. This is because one positive proton will cancel out one negative electron; therefore, if the atom is neutral, it must have the same number of protons and electrons.The number of protons is also the same as the atomic number. For this example, Bromine, with the atomic number of 35, has 35 protons.Bromine:Atomic number- 35Number of protons- 35Number of electrons- 35The mass number is the sum of the atomic number (or number of protons/electrons) and the neutrons. For this example, we know the atomic number (35) + # neutrons = mass number (80). To figure out the number of neutrons, take the mass number and subtract the number of electrons/protons/atomic number. Mass number (80) - atomic number (35) = neutrons (45).
What term best describes the sum of the number of protons and neutrons in an atom?
Atomic mass
How many electrons are in Cr-52?
There are 24 protons in Chromium (including Chromium54) of any isotope. Isotopes are just elements with different numbers of neutrons. If it is called chromium it has 24 protons. The atomic number of an element is the same as the number of protons.
What do atomic number and atomic mass mean?
The atomic number is equal to either the number of electrons or the protons of a particular atom. The atomic mass in a.m.u. is equal to the sum of protons and neutrons in an atom.
The atomic mass of an atom is equal to the sum of numbers of what?
protons + electrons= atomic mass NUMBER, not the atomic mass.
Which term describes the sum of the number of protons and neutrons in an atom?
when you could check in most of atoms that we have you will see that the sum of protons and electrons equals to or is called the atomic weight or atomic mass...that is if you add protons to electrons you have your atomic mass.
Is the number of protons within an atom of an electron is equal to its atomic mas?
The number of protons in an atom's nucleus is its atomic number. Each element has its own unique atomic number. An individual atom's atomic mass is the sum of the masses of the protons, neutrons, and electrons in the atom.
Is the mass number the sum of electrons and protons in the atom?
No electrones have no mass
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.
All of the mass of an atom is due to the?
The mass of an atom is the sum of the masses of protons, neutrons and electrons.
How the atomic number related to the core electrons?
For a neutral (uncharged) atom, the total number of electrons is equal to the atomic number (number of protons). This would be the sum of the core electrons plus the valence electrons.
Do electrons equal the sum of the number of neutrons and protons in an isotope?
No. The number of neutrons has no affect on the number of protons and electrons.
What is the mass of an atom mainly determined by?
The sum of masses of protons, neutrons and electrons.
What is the mass of an atom that has 10 protons 13 neutrons 10 electrons?
The mass number of this atom is 23, the sum of the number of protons and neutrons.
Why an atome is neutral?
Answer:The number of protons and the number of electrons in an atom is always the same. Therefore, the electric charges cancel each other. The atom is neutral. An atom is made up of three different kinds of subatomic particles, namely protons, electrons and neutrons. Protons are positively-charged, and electrons are negatively-charged.The charge on an electron has the same charge as that on a proton, but has the opposite sign. (With a charge of -1 for the electron and +1 for the proton. So just as in simple maths +1 and -1 cancel each other out to giving a sum of 0, to make the atom neutral.) So as long as the protons and electrons are present in equal numbers, the atom overall will have a neutral charge. By definition, an atom has an equal number of protons and neutrons.
