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Which among the following elements would lose an electron easily?
Concept: undefined >> undefined
Which among the following is the largest element?
Concept: undefined >> undefined
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The first person to step on the moon is _______.
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Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______
Concept: undefined >> undefined
Find the odd one out and give its explanation.
Concept: undefined >> undefined
Find the odd one out and give its explanation.
Concept: undefined >> undefined
Find the odd one out and give its explanation.
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Write the name of noble gas having 2 electrons in its valence shell.
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Write the name of an element having electronic configuration 2,8,2.
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What determines the chemical reactivity of elements?
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Match the columns.
| Column A | Column B |
| 1) s -block | a) Lanthanides and actinides |
| 2) p -block | b) Group 3 to 12 |
| 3) d -block | c) Group 1, 2 |
| 4) f -block | d) Group 13 to 18 |
| e) Zero group |
Concept: undefined >> undefined
Match the columns.
| Column A | Column B |
| Electronic configuration |
Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
Concept: undefined >> undefined
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
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The number of electrons in the outermost shell of an atom determines the _______.
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Write the name.
The element having stable electron configuration from the third period.
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Write the name.
Highest electropositive element
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Write the name.
The group of elements having electronic configuration 2, 2.
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The valency of the elements in group 2 is 1.
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The elements lithium and beryllium are in the same period because their valencies are similar.
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Beryllium and calcium are alkaline earth metals.
Concept: undefined >> undefined
