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Special cases of Oxidation Number

Q 4 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.

If the difference between a number and two fifths of the number is 30, find the number.

Name different types of teeth and their number in adult humans.

The number of different factors the number 75,600 has is