SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A substance whose all the atoms have same atomic number is called ____
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Element
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Molecule
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Compound
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None of the above
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Explanation:
Detailed explanation-1: -Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.
Detailed explanation-2: -An element is a substance consisting of atoms which all have the same number of proton i.e. the same atomic number.
Detailed explanation-3: -Atoms of the same element have the same atomic number so the number of protons (and electrons) are same. But they have same or different mass numbers (like that for isotopes). Different mass number will have different number of neutrons.
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