how do atoms that have 5,6 or 7 electrons in their last shell become stable??

Answer 1

by gaining electrons or sharing them 5 will get 3 , 6 will get 2 and 7 will get 1 . and that wll be called ionic compund but it can also by having a covalent compound with each other or other non metales . For example oxygen will share 2 with an other atom of oxygen to have atoatl of 8 electrons in the valance shell

Answer 2

Well if they're gaining electrons, then to able to have a stable shell and atom is to have a maximum number of 8 electrons. Hence 3 electrons, 2 and 1.

Answer 3

These are nonmetals which take electrons to fill that shell to 8, the stabl number. Column 5(15) takes 3e-, column 6(16) takes 2e-, column 7(17) takes 1 e-.

Answer 4

They do their best to get into the noble gas configuration. Depending which is easier to accomplish in its environment, this usually means picking up 1, 2, or 3 electrons from it's surroundings. Examples are Nitrogen, Oxygen, and Chlorine, respectively.

Answer 5

by combining with atoms which have 1,2,or 3 excess electrons in their outer shell. this combining is called an acidic/basic action but it refers to the electron action not the acid/base salt situation. giving up electrons is called acidic and receiving electrons is called basic and refers only to the balancing of the eloectron charges in a chemical reaction and not the creation of a salt such as naoh.
an example is carbon commbining with four hydrogen to create methane. in this reaction carbon is the acidic and hydrogen is the base.
it has been many years since i had chemistry, but this may be just the opposite with carbon as the base and hydrogen as the acid.

Answer 6

By accepting 3,2 and 1 electron respectively.