yes
Nonmetal atoms are the atoms that borrow electrons. The number of atoms that can be borrowed or lent are what's known as valence.
Firstly I would like to correct you on your grammar. The question should in fact ask 'which' element gains 5 electrons. The question is also flawed form the start because more than one element gains 5 electrons. All elements in group 3 of the Periodic Table have 5 spaces in the outer shell. All elements want to feel complete, and the maximum amount of elements on the outer shell is 8. Therefore 3 + 5 = 8. So hey presto this is my answer to you. ~K :)
That isn't necessarily true. The Halogens (group 17) follow what you said, but the Alkali metals (group 1) don't. As you go down the column, the elements get more reactive for group 1; Lithium is the least reactive and Francium (speculated) is the most reactive. On the other hand, as you down the Halogens, they do get less reactive. Astatine (speculated) is the least reactive while Fluorine is the most reactive element of them all. Hope that clears up things!
Bromine gain one electron and become Br-.
Covalent bonds are 'electron sharing' bonds, as the name implies, but the sharing doesn't have to be equal. Any tendency for the shared electrons to favor one side of the bond over the other in their average distribution will lend an asymmetry to the arrangement of the atoms (if there are three or more atoms participating in the bond). A good example of a directional covalent bond is water, where the molecule has an angular structure due to the asymmetric distribution of electrons between hydrogen and oxygen.
Nonmetal atoms are the atoms that borrow electrons. The number of atoms that can be borrowed or lent are what's known as valence.
Firstly I would like to correct you on your grammar. The question should in fact ask 'which' element gains 5 electrons. The question is also flawed form the start because more than one element gains 5 electrons. All elements in group 3 of the Periodic Table have 5 spaces in the outer shell. All elements want to feel complete, and the maximum amount of elements on the outer shell is 8. Therefore 3 + 5 = 8. So hey presto this is my answer to you. ~K :)
That isn't necessarily true. The Halogens (group 17) follow what you said, but the Alkali metals (group 1) don't. As you go down the column, the elements get more reactive for group 1; Lithium is the least reactive and Francium (speculated) is the most reactive. On the other hand, as you down the Halogens, they do get less reactive. Astatine (speculated) is the least reactive while Fluorine is the most reactive element of them all. Hope that clears up things!
2 because it has two outer shell electrons out of 8 (relevant rule only for the first 20 elements)
Bromine borrows electrons
2
one
2
In theory 2 but in practice this has never been found. Helium is extremely stable and holds on to its electrons and does not share or "lend" them.
Francium is an alkali metal that will lend electrons in an ionic compound.
Magnesium is a metal element. There are 12 electrons in a single atom.
Any element can oxidize(take an electron from) another element during chemical reactions as long as it has a partial positive charge. The most common element that is an oxidizing agent is Hydrogen.