GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons?
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3515D
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2015D
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1515D
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1520D
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Explanation:
Detailed explanation-1: -15 protons and 20 neutrons is “Pb."
Detailed explanation-2: -Write the correct representation of an element ‘X’ which contains 15 electrons and sixteen neutrons. Answer: The correct representation of the element X is 15X31.
Detailed explanation-3: -The element with atomic number $ 15 $ is phosphorus.
Detailed explanation-4: -Calcium is the element with atomic number 20 and its symbol is Ca. Was this answer helpful?
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