I need help !

please number them when u type it thanks <3

I could only find the answer for the 1st one and 2nd one

3.    

Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

4.

The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.