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Question
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
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Solution
Name: Hydrogen
Symbol: H
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The atomic size:
Nanometer unit is used to measure atomic radius.
The electronic configuration of metal A is 2, 8, 18, 1.
The metal A when exposed to air and moisture forms B a green layered compound. A with con. H2 SO4 forms C and D along with water. D is a gaseous compound. Find A, B, C, and D.
Which of the following are the characteristics of isotopes of an element?
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- Isotopes of an element have same atomic number
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An element with the largest atomic radius among the following is ______.
Arrange the following in order of increasing radii:
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Give reason for the following:
The size of a Cl− ion is greater than the size of a Cl atom.
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these have least atomic size in period 3?
