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Why doesnt the mass number change when electrons are added or removed?
Wiki User
∙ 10y ago
The mass of an electron is very small, almost negligible, compared to that of a proton or neutron.
Wiki User
∙ 10y ago
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Why doesnt the number of protons change for a single element while the neutrons and electrons can?
The protons don't change because if the number of protons changes, the type of element the atom is changes. The number of protons determine the species of the atom.
1 In an electrically neutral atom the number of protons in the nucleus is equal to the number of?
In an atom, the number of electrons is equal to the number of protons in the nucleus of the atom. This only varies in ions, where electrons have been added to an atom or removed to create a full outer shell.
The number of electrons that must be added to or removed from an atom in a combinded state to convert the atom into elemental form?
oxidation number
Which best explains why cations are smaller than atoms from which they are formed?
A cation has had electrons removed. So, although cations and their parent atoms have the same number of protons in the nucleus they have a different number (lower) of electrons. This means the same number of protons pulls the smaller number of electrons closer to the nucleus and so the remaining electrons are more tightly bound by the nucleus and hence the reduction in size.
When Ca undergoes oxidation does the number of neutrons increase?
Of course not. No change in neutrons. Number of electrons decrease
If you change the number of electrons you get a positive negative or neautraul?
That depends on how you change the number of electrons.
Why doesnt the number of protons change for a single element while the neutrons and electrons can?
The protons don't change because if the number of protons changes, the type of element the atom is changes. The number of protons determine the species of the atom.
Do the number of electrons for an ion differ from its neutral atom?
no it doesnt
Why doesnt An atom has no electrical charge?
because the number of protons (which have a positive charge of +1) and the number of electrons (which have a negative charge of -1) are the same. when number of protons = number of electrons, overall charge = 0
The number of electrons that are added or removed from an atom in a combined state to convert it to an elemental form?
oxidation number
Lithium Ion has how many electrons and protons?
When you say Ion you have to specify whether its negative or positive and the number associated with it. For example: if its Li 3- it means it has 3 more electrons then regular Lithium (which has 3 electrons) that makes it 6 electrons and 3 protons (this nr doesnt change) for Li 3-. Obviously calculations vary depending on the type of ion.
When an atom changes to cation what happens to the number of electrons?
Electron/s are removed from the atom.
How do the number of electrons change across the period of elements?
they get more electrons the farther right the get
Why atomic number is expressed by protons and not electrons?
electrons change the charge of an atom, not the element itself.
1 In an electrically neutral atom the number of protons in the nucleus is equal to the number of?
In an atom, the number of electrons is equal to the number of protons in the nucleus of the atom. This only varies in ions, where electrons have been added to an atom or removed to create a full outer shell.
How does the number of valence electrons change as you go across the 2nd period of the periodic table?
the no. of electrons increses
The number of electrons that must be added to or removed from an atom in a combinded state to convert the atom into elemental form?
oxidation number
