Question

what is negative ion?

Answer 1

An atom that has acquired an electron(s) and now has a different number of positive charges (protons) to negative charges (electrons).

Answer 2

When an atom gains an electron in order to complete its outermost shell it is termed as negative ion

Answer 3

Negative ion is also named Anion

Answer 4

if it has more no of electron than the no of protons the atom bears a -ve charge and termed s negative ion
example =Cl_
and if the no of protons are more than the no of electrons than it is termed as positive ions
Na+

Answer 5

Would you settle for a whole bunch? I didn't think so. The number of atoms in one person is almost too big to write out. But fortunately there's a shorthand system, called scientific notation, that we use instead for writing really BIG or really SMALL numbers. Since huge numbers are generally just estimates anyway, we just use the first few numbers, followed by a code that tells you how many zeros would follow if you wrote it all out. Ok, here it goes. Hydrogen, oxygen and carbon make up about 99% of the average human. I'm going to cheat a little and leave out the other 1%, which is made up of trace elements (that is, stuff there's only a trace of in the body). Then, let's assume an average adult weighs 70 kilograms. Be sure to keep in mind that the following numbers are based on the number of atoms, not percent of body weight (by weight we are mostly oxygen). A 70 kg body would have approximately 7*1027 atoms. That is, 7 followed by 27 zeros: