When radioactive substance emits an - - particle- then its position in the periodic table is lowered by-

The correct option is A two placesWhen radioactive substance emits an #945; #8722;particle, then its position in the periodic table is lowered by two plac ...

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Standard IX

Chemistry

Properties of Alpha, Beta and Gamma Radiations

When radioact...

Question

When radioactive substance emits an $α -$ particle, then its position in the periodic table is lowered by:

two places

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three places

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five places

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one place

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Solution

The correct option is A two places
When radioactive substance emits an α−particle, then its position in the periodic table is lowered by two places as the atomic number is reduced by 2.
$_{a}^{b} X \to_{a - 2}^{b - 4} Y +_{2}^{4} α$

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When radioactive substance emits an α− particle, then its position in the periodic table is lowered by:

The correct option is A two placesWhen radioactive substance emits an α−particle, then its position in the periodic table is lowered by two places as the atomic number is reduced by 2. baX→b−4a−2Y+42α

When radioactive substance emits an $α -$ particle, then its position in the periodic table is lowered by:

The correct option is A two places
When radioactive substance emits an α−particle, then its position in the periodic table is lowered by two places as the atomic number is reduced by 2.
$_{a}^{b} X \to_{a - 2}^{b - 4} Y +_{2}^{4} α$