13 protons would indicate the element is aluminum, Al. It has the electron configuration of
1s2 2s2 2p6 3s2 3p1. In the 3rd energy level, there are 3 electrons, thus it has a total of 3 valence electrons.
Number 13 is Aluminum, having 3 valence electrons (K,L,M = 2,8,3), so the metal ion is Al3+
It has 13 unless it's an ion. Number 13 is Aluminium.
13 protons is aluminum, which is in group 13 (or 3A) which means 3 valence electrons.
aluminum
6
None. the positive charges on the 13 protons and the negative charges on the 13 electrons cancel each other out
Only for hydrogen and helium are these two numbers the same. All other elements have at least two non-valence electrons, and the total number of electrons must be equal to the number of protons. Therefore, in all elements except hydrogen and helium, the number of valence electrons is less than the number of protons.
12, the same as the number of protons indicated by magnesium having an atomic number of 12.
Sodium's atomic number is 11. To be neutral then, it must have 11 protons and 11 electrons. Since sodium is in group 1, it has 1 valence electron.
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
None. the positive charges on the 13 protons and the negative charges on the 13 electrons cancel each other out
No, the number of total electrons is equal to the number of protons.
Rarely. The number of valence electrons of an element depends on it's position on the periodic table. Any given element can have between 1-8 valence electrons. The number of valence electrons increases left to right on the periodic table, while the number of protons, which determine the atomic mass and identity of an element, increase in general. Therefore the number of valence electrons can only equal the number of protons at the 8th element and below (neon).
YES!!!!
Only for hydrogen and helium are these two numbers the same. All other elements have at least two non-valence electrons, and the total number of electrons must be equal to the number of protons. Therefore, in all elements except hydrogen and helium, the number of valence electrons is less than the number of protons.
valence electrons
He has 2 valence electrons. Look on a periodic table. It will show He only has 2 protons and the number of protons and electrons is equal. It is an exception to the rule of group numbers corresponding to valence numbers.
12, the same as the number of protons indicated by magnesium having an atomic number of 12.
Elements in the same group have the same number of valence electrons. These are the outer-shell electrons that react with other elements.
Yes and no; the number of protons determine the valance number of electrons. The valence level of electrons and how full/empty it is largely determines an elements chemical behavior. I would say that valence electrons are the main determinant, but that is predetermined by protons.
Sodium's atomic number is 11. To be neutral then, it must have 11 protons and 11 electrons. Since sodium is in group 1, it has 1 valence electron.
In the neutral atom of a chemical element number of electrons= number of protons=atomic number.