SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An atom of element R has 14 neutrons. Nucleon number of element R is 27. In which Group and period R located in Periodic Table?
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Group 13. period 2
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Group 14, Period 2
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Group 13, Period 3
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group 14, Period 3
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Explanation:
Detailed explanation-1: -Hence, the element with 13 electrons in its M-shell has an atomic number of 25 and is manganese.
Detailed explanation-2: -An atom of an element contains 13 electrons. Its nucleus has 14 neutrons.
Detailed explanation-3: -<br> Therefore, this element is aluminium (Al). <br> Number of electrons in the Al atom = 13 <br> Number of electrons in the ‘Al^(3+)‘ion = 13-3 = 10. <br> As it is formed from the neutral atom by loss of 3 electrons.
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