Chemistry
The electronegativities (according to Pauling) of the elements in Period 3 of the Periodic Table are as follows with the elements arranged in alphabetical order :
| Al | Cl | Mg | Na | P | S | Si |
| 1.5 | 3.0 | 1.2 | 0.9 | 2.1 | 2.5 | 1.8 |
Arrange the elements in the order in which they occur in the Periodic Table from left to right.
(The group 1 element first, followed by the group 2 element and so on, up to group 7).
Periodic Table
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Answer
We know that electronegativity increases from left to right in a period. Hence, the order of the elements in the periodic table is:
Na, Mg, Al, Si, P, S, Cl.
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