Question

what is an ion?
define the following terms
1)electron
2)atom
3)atomic mass

Answer 1

Answer:

(1) Atom: The smallest part into which an element can be divided.

(2) Isotope: Species having same atomic number but different mass number.

(3) Atomic number: Number of electrons present in an atom which is equal to number of protons in a neutral atom.

(4) Atomic mass number: Sum of the number of protons and neutrons i.e, nucleons present in an atom.

(5) Moderator in nuclear reactor: A material that slows the speed of neutrons.

Answer 2

Answer:

Those who have ability to loose our election and form positive charge know as iron ELECTON---- those carrying negative charge know as electron ATOM --- smallest unit of an elements ATOMIC MASS --sum of netroun and proton know as atomic mass