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Earn 100

The Valency of Hydroxide ion is  .

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Important Questions on Structure of The Atom

MEDIUM
Science>Chemistry>Structure of The Atom>Valency
The pair of valencies exhibited by tin(Sn) is
HARD
Science>Chemistry>Structure of The Atom>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 The Atom>Valency
 Define valency.
MEDIUM
Science>Chemistry>Structure of The Atom>Valency
Which one of the following is cation 
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Science>Chemistry>Structure of The Atom>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 The Atom>Valency
Hydrogen contains three types of atoms (H11 protium, H12 deuterium, H13 tritium). These atoms are
EASY
Science>Chemistry>Structure of The Atom>Valency

Give one phrase for the following statement:

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

MEDIUM
Science>Chemistry>Structure of The Atom>Valency
Valence electron in Cl- ions is 
MEDIUM
Science>Chemistry>Structure of The Atom>Valency
Isotopes of an element contains 
MEDIUM
Science>Chemistry>Structure of The Atom>Valency

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

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Science>Chemistry>Structure of The Atom>Valency
A positively charged body has
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Science>Chemistry>Structure of The Atom>Valency
 O816 -16 and O817-17 are the two _____ of oxygen.
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Science>Chemistry>Structure of The Atom>Valency
Isotopes have different mass numbers because their nuclei contain different number of _____.
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Science>Chemistry>Structure of The Atom>Valency
When there is more number of electrons than protons, the atom is called_____
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Science>Chemistry>Structure of The Atom>Valency
Air conditioners, fluorescent lamps and printers, etc. are generators of _____. (negative ion / positive ion)
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Science>Chemistry>Structure of The Atom>Valency
A group of atoms carrying a fixed charge on them is called _____ ions. (triatomic/ polyatomic)
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Science>Chemistry>Structure of The Atom>Valency
The isotope _____ of carbon is radioactive. (C-12 / C-14 / C-13)
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Science>Chemistry>Structure of The Atom>Valency
Isotopes have the same atomic number but different _____ number.
EASY
Science>Chemistry>Structure of The Atom>Valency
The particle which is formed by the loss or gain of electrons by an atom is called _____.
EASY
Science>Chemistry>Structure of The Atom>Valency
A group of atoms carrying a fixed charge on them is called _____.