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Byju's Answer
Standard XII
Chemistry
Isobars and Isotopes
Isotopes of s...
Question

Isotopes of same element exists in nature.How they differ from each other ?

A
They will have different locations on the periodic table.
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B
They will have different numbers of electrons.
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C
They will have undergo different chemical reactions.
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D
They have different numbers of protons.
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E
They have different numbers of neutrons.
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Solution

The correct option is E They have different numbers of neutrons.
Isotopes of the same element must have same number of protons but different number of neutrons.
Also the isotopes of same element are located at same place in the periodic table and undergo same chemical reaction.

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Question 07

Two atoms are said to be isobars if ?

(a) They have same atomic number but different mass number

(b) They have same number of electrons but different number of neutrons

(c) They have same number of neutrons but different number of electrons

(d) Sum of the number of protons and neutrons is same but the number of protons is different

Q. Statement I : Deuterium and hydrogen are different elements.
Statement II: They have the different numbers of protons in each.
Q. When two compounds have the same chemical formula, (that is, they have the same number and variety of atoms) but have different linkages between atoms and hence different properties, they are called:
Q.
Isotopes are the atoms of the same element; they have the same atomic number but different mass numbers. Isotopes have a different number of neutrons in their nucleus. If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m: n, then average atomic mass will m×a+n×bm+n.
Different isotopes of the same element have the same position in the periodic table. The elements which have single isotope are called monoisotopic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature.

Answer the following questions:

The ratio of the mass of 12C atom to that of an atom of element= X (whose atomicity is four) is 1:9. The molecular mass element X is:
Q. The isotopes of hydrogen have different physical properties due to the difference in mass. They have almost same chemical properties with a difference in their rates of reactions which is mainly due to:
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