1. Atomic mass number is a whole number.
2. Atoms are stable though negatively
charged electron are revolving within it.
Q1. Define the following terms
a. Atom
b. Isotope
c. Atomic number
d. Atomic mass number
Madon
e. moderator in nuclear reactor.
Answers
Answer:
1.)Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom.
2.)Atoms are stables though negatively charged electrons are revolving within it because each atom contains equal numbers of protons and electrons. So, charge on negatively charged electrons are balanced by charge on positively charged proton. Therefore, atom is electrically neutral and stable.
Explanation:
(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:
Atomic number and mass number are always whole numbers because they are obtained by counting whole object (protons, neutron, and electrons) the sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in atom....