Explain with axampled 1atomic number 2mass number 3 isotopes 4 isobers
Answers
Answer:
(i) Atomic number: The atomic number is the total number of protons present in the atom. For example, the atomic number of sodium is 11. It contains 11 protons and 11 electrons.
(ii) Mass number: It is the sum of the number of neutrons and the number of protons. For example, the atomic number of magnesium is 12 which is equal to the number of protons, the number of neutrons of magnesium is 12. The mass number is equal to 24 (12+12).
(iii) Isotopes are the elements having same atomic number but different mass number. They have same chemical properties as the number of valence electrons are same. For example, 6C12, 6C13, 6C14 are the three isotopes of carbon. They have same atomic number but different mass number due to difference in the number of neutrons.
(iv) Isobars: They are elements having the same mass number but different atomic number. For example. 18Ar40, 19K40 are isobars having the same atomic mass but different atomic number.
The two uses of isotopes are:
Nuclear weapons and nuclear power require large quantities of isotopes of uranium.
An isotope of cobalt is used in the treatment of cancer.
Explanation:
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Answer:
Atomic number: The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.
Mass number: The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. It is approximately equal to the atomic mass of the atom expressed in atomic mass units.
Isotopes: Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom. For example, carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13, and 14, respectively.
Isobars: Isobars are atoms of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number but have the same mass number. An example of a series of isobars would be ⁴⁰S, ⁴⁰Cl, ⁴⁰Ar, ⁴⁰K, and ⁴⁰Ca.