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Question
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Solution
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
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RELATED QUESTIONS
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
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|
B |
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|
C |
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3 |
|
D |
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|
E |
14 |
7 |
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