Explain with examples i. atomic number ii. mass number iii. isotopes and iv. isobars give any two uses of isotopes
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Here is your answer ;
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Atomic number of an element is equal to the number of protons or electrons found in the nucleus of a stable atom of an element. It is denoted by Z. Eg; the atomic number of Lithium (Li ) is 3.
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Mass number of an element is the sum of the number of protons and neutrons present in the nucleus. It is denoted by A = n + p. Eg; A of Li is 7.
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They are the atoms of the same element which have the same atomic number but different mass numbers, ie. Number of neutrons is different. Eg; the isotopes of H are protium(n=0), deuterium(n=1), tritium(n=2).
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Atoms of different elements which have different atomic numbers but same mass number are called isobars . Eg; argon and calcium have mass no.s both 40.
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1)Radioactive carbon of mass 14 is used to determine the age of old speciments like wood and fossil fuels, which is called carbon reading.
2)Radioactive uranium 235 is used as a fuel in nuclear reactors.
Here is your answer ;
;
Atomic number of an element is equal to the number of protons or electrons found in the nucleus of a stable atom of an element. It is denoted by Z. Eg; the atomic number of Lithium (Li ) is 3.
;
Mass number of an element is the sum of the number of protons and neutrons present in the nucleus. It is denoted by A = n + p. Eg; A of Li is 7.
;
They are the atoms of the same element which have the same atomic number but different mass numbers, ie. Number of neutrons is different. Eg; the isotopes of H are protium(n=0), deuterium(n=1), tritium(n=2).
;
Atoms of different elements which have different atomic numbers but same mass number are called isobars . Eg; argon and calcium have mass no.s both 40.
;
1)Radioactive carbon of mass 14 is used to determine the age of old speciments like wood and fossil fuels, which is called carbon reading.
2)Radioactive uranium 235 is used as a fuel in nuclear reactors.
Shaanraj:
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Answered by
19
Hola dear user☺️
✨A VERY PLEASANT AND CALM AFTERNOON✨
=> Explain with examples:
i. Atomic number,
ii. Mass number,
iii. Isotopes, and
iv. Isobars.
=> Give any two uses of isotopes.
⏬ANSWER⏬
(i) Atomic number:
The number of protons in one atom of an element is known as atomic number of that element.
For example, one atom of sodium element has 11 protons in it, so the atomic number of sodium is 11. Similarly, one atom of carbon element has 6 protons in it, so the atomic number of carbon is 6.
(ii) Mass number:
The total number of protons and neutrons present in one atom of an element is known as it's mass number.
For example, one atom of sodium element contains 11 protons and 12 neutrons, so the mass number of sodium is 11 + 12 = 23. Similarly, a normal carbon atom has 6 protons and 6 neutrons, so the mass number of carbon is 6 + 6 = 12.
(iii) Isotopes:
Isotopes are atoms of the same atomic number but different mass numbers. The isotopes of an element have the atomic number because they contain the same number of protons (and electrons). The isotopes of an element have different mass numbers because they contain different number of neutrons.
Here is an example of isotopes:
All the chlorine atoms contain 17 protons, so the atomic number of all the chlorine atoms is 17. Now, some chlorine atoms have 18 neutrons whereas other chlorine atoms contains 20 neutrons. Chlorine can, therefore, have mass of 17 + 18 = 35 or 17 + 20 = 37. Thus, chlorine has two isotopes of mass numbers 35 and 37 respectively.
(iv) Isobars:
Isobars are the atoms of different elements having different atomic numbers but the same mass number. Isobars have different number of protons in their nuclei but the total number of nucleons (protons + neutrons) in them is same.
An example of isobars is argon, and calcium. This is because argon and calcium are atoms of different elements having different atomic numbers of 18 and 20 respectively but they have the same mass number of 40.
Uses of Isotopes:
i. Radioactive isotopes (such as Uranium–235) are used in fuel in nuclear reactors of nuclear power plants for generating electricity.
ii. Radioactive isotopes (such as Cobalt–60) are used in the treatment of cancer.
//////////////////////////////////////////////////////////////////////////////////////////
Hope this helps✌️
✨A VERY PLEASANT AND CALM AFTERNOON✨
=> Explain with examples:
i. Atomic number,
ii. Mass number,
iii. Isotopes, and
iv. Isobars.
=> Give any two uses of isotopes.
⏬ANSWER⏬
(i) Atomic number:
The number of protons in one atom of an element is known as atomic number of that element.
For example, one atom of sodium element has 11 protons in it, so the atomic number of sodium is 11. Similarly, one atom of carbon element has 6 protons in it, so the atomic number of carbon is 6.
(ii) Mass number:
The total number of protons and neutrons present in one atom of an element is known as it's mass number.
For example, one atom of sodium element contains 11 protons and 12 neutrons, so the mass number of sodium is 11 + 12 = 23. Similarly, a normal carbon atom has 6 protons and 6 neutrons, so the mass number of carbon is 6 + 6 = 12.
(iii) Isotopes:
Isotopes are atoms of the same atomic number but different mass numbers. The isotopes of an element have the atomic number because they contain the same number of protons (and electrons). The isotopes of an element have different mass numbers because they contain different number of neutrons.
Here is an example of isotopes:
All the chlorine atoms contain 17 protons, so the atomic number of all the chlorine atoms is 17. Now, some chlorine atoms have 18 neutrons whereas other chlorine atoms contains 20 neutrons. Chlorine can, therefore, have mass of 17 + 18 = 35 or 17 + 20 = 37. Thus, chlorine has two isotopes of mass numbers 35 and 37 respectively.
(iv) Isobars:
Isobars are the atoms of different elements having different atomic numbers but the same mass number. Isobars have different number of protons in their nuclei but the total number of nucleons (protons + neutrons) in them is same.
An example of isobars is argon, and calcium. This is because argon and calcium are atoms of different elements having different atomic numbers of 18 and 20 respectively but they have the same mass number of 40.
Uses of Isotopes:
i. Radioactive isotopes (such as Uranium–235) are used in fuel in nuclear reactors of nuclear power plants for generating electricity.
ii. Radioactive isotopes (such as Cobalt–60) are used in the treatment of cancer.
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Hope this helps✌️
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