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Define isotopes.

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Important Questions on Structure of Atom

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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Isotopes of an element contains 
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Valence electron in Cl- ions is 
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
The half-life of a radioisotope is 4 hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
A positively charged body has
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Hydrogen contains three types of atoms (H11 protium, H12 deuterium, H13 tritium). These atoms are
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion X-2?
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Which one of the following is cation 
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency

The following is the correct decreasing order of the ionic radii- 

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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
 Define valency.
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency

Give one phrase for the following statement:

Process of formation of ions from molecules which are not in the ionic state.

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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Oxygen has three isotopes: O16 , O17, O18. How do the atoms of these isotopes differ?
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Isotopes have the same chemical properties but different physical properties. Explain.
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
An outermost-shell, which had eight electrons was said to possess _____ .
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
In sodium chloride, its constituent particles are?
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Give a reason for different atomic masses of the isotopes of an element.
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Define valency.
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Write brief notes on: isotopes.
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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency

 What are isotopes? How do the three isotopes of oxygen differ?

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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency

A negatively charged ion is called as:

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Science>Chemistry>Structure of Atom>Isotope, Formation of Ion, Valency
Which of the following is not an isotope of hydrogen atom?