The number of electrons an atom would gain or lose when forming ionic bonds. it can be positive, negative or zero what is this?

example: iron (iii), ca2+, f-

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

Which of the following is a responsibility of a scientist