Define the following forms
A. Atom
B. Isotope
C. Atomic number
D. Atomic mass number
E. Moderator in nuclear reactor
A. Atom
B. Isotope
C. Atomic number
D. Atomic mass number
E. Moderator in nuclear reactor
a. An atom is defined as the structural and functional unit of a matter. The term "atom" comes from the Greek word which means indivisible because atoms are the smallest things in the universe and could not be divided. atoms are made up of three subatomic particles like protons, neutrons, and electrons.
b.Isotopes: Isotopes are atoms that have the same atomic number but different mass numbers. Isotopes have the same numbers of protons but different numbers of neutrons.
c.Atomic number: The number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table. The atomic number is also equal to the number of electrons in an atom.
For example :
Atomic number of carbon = 6
Atomic number of nitrogen = 7
Atomic number of oxygen = 8
Atomic number of magnesium = 12
d.Atomic Mass Number: It is the sum of the total number of protons and neutrons present in a nucleus.
atomic mass number = number of protons + number of neutrons.
Atomic number = number of protons = number of electrons.It is denoted by Z.
Mass number = number of protons + number of neutrons. It is denoted by A.
For example : Carbon atom its, Number of proton = 6
Number of neutrons = 6
Number of electron = 6
Atomic number (Z) = number of protons = number of electrons = 6
Mass number (A) = number of proton + number of neutrons = 6 + 6 =12
e.Moderator in the nuclear reactor:A moderator is a material used in a nuclear reactor to slow down the speed of neutrons in nuclear fission.
Moderators are made up of materials with light nuclei that do not absorb the neutrons but slow down the speed of neutrons by a series of successive collisions.
For example, graphite, beryllium, etc.
a. An atom is defined as the structural and functional unit of a matter. The term "atom" comes from the Greek word which means indivisible because atoms are the smallest things in the universe and could not be divided. atoms are made up of three subatomic particles like protons, neutrons, and electrons.
b.Isotopes: Isotopes are atoms that have the same atomic number but different mass numbers. Isotopes have the same numbers of protons but different numbers of neutrons.
c.Atomic number: The number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table. The atomic number is also equal to the number of electrons in an atom.
For example :
Atomic number of carbon = 6
Atomic number of nitrogen = 7
Atomic number of oxygen = 8
Atomic number of magnesium = 12
d.Atomic Mass Number: It is the sum of the total number of protons and neutrons present in a nucleus.
atomic mass number = number of protons + number of neutrons.
Atomic number = number of protons = number of electrons.It is denoted by Z.
Mass number = number of protons + number of neutrons. It is denoted by A.
For example : Carbon atom its, Number of proton = 6
Number of neutrons = 6
Number of electron = 6
Atomic number (Z) = number of protons = number of electrons = 6
Mass number (A) = number of proton + number of neutrons = 6 + 6 =12
e.Moderator in the nuclear reactor:A moderator is a material used in a nuclear reactor to slow down the speed of neutrons in nuclear fission.
Moderators are made up of materials with light nuclei that do not absorb the neutrons but slow down the speed of neutrons by a series of successive collisions.
For example, graphite, beryllium, etc.
