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Find the odd one out and give its explanation.
Concept: undefined >> undefined
Find the odd one out and give its explanation.
Concept: undefined >> undefined
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Find the odd one out and give its explanation.
Concept: undefined >> undefined
Answer the following question in one sentence.
Write the name of the noble gas having 2 electrons in its valence shell.
Concept: undefined >> undefined
Answer the following question in one sentence.
Write the name of an element having electronic configuration 2,8,2.
Concept: undefined >> undefined
Answer the following question in one sentence.
What determines the chemical reactivity of elements?
Concept: undefined >> undefined
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 Electronic configuration |
Column B 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 |
Concept: undefined >> undefined
The number of electrons in the outermost shell of an atom determines the ______.
Concept: undefined >> undefined
Write the name.
The element having stable electron configuration from the third period.
Concept: undefined >> undefined
Write the name.
Highest electropositive element
Concept: undefined >> undefined
Write the name.
The group of elements having electronic configuration 2, 2.
Concept: undefined >> undefined
Right or wrong sentence.
The valency of the elements in group 2 is 1.
Concept: undefined >> undefined
Right or wrong sentence.
The elements lithium and beryllium are in the same period because their valencies are similar.
Concept: undefined >> undefined
Beryllium and calcium are alkaline earth metals.
Concept: undefined >> undefined
Right or wrong sentence.
The number of shields decreases as the calculation goes down from top to bottom.
Concept: undefined >> undefined
Right or wrong sentence.
Electro chemicals are devices that convert electrical energy into mechanical energy.
Concept: undefined >> undefined
India is the first country to discover the existence of water on the moon.
Concept: undefined >> undefined
Write an explanation.
Group
Concept: undefined >> undefined
