No
No, nitrogen does not become a negative ion before bonding. Nitrogen typically forms covalent bonds, in which it shares electrons with other atoms.
chlorine
Chlorine becomes a negative ion in the process of bonding; ionization and bonding are simultaneous, so no, it does not happen before bonding.
No, aluminum does not become a negative ion; like all metals, it forms a positive ion.
No. Sulfur typically forms negative ions (sulfide ions) by gaining two electrons to achieve a stable electron configuration.
no, because carbon can neither donate or accept electrons , since it has 4 electrons in its outermost shellif it donates the remaining electrons fall into the nucleus as the number of protons is 4 more.And if it accepts nucleus cannot bare 4 more electrons. so it just forms co-valent bond with other atoms which doesnot need to become an ion before bonding.
There are some unstable compounds which are formed as transitional compounds of multistep mechanisms, and they are known as carbocations.
Gaining an electron that has a negative charge would negatively charge the atom.
Nitrogen needs to be fixed before it is used by plants.
No. Helium is a noble gas. It does not want to gain or lose electrons as it already has a full valence shell. In order to become a positive ion it would need to lose an electron.
You can't just remove a proton or an electron. But theoretically, it will become an atom of the compound just before it in the periodic table. For example, Oxygen will become Nitrogen.
Nitrogen must be in the compound form before it is used by plants or animals