GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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is much more massive
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has a full outermost energy level
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has a negative electric charge
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is in a different group in the periodic table
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Detailed explanation-1: -A lithium ion is much less / more reactive than a lithium atom, because it has a full outermost energy level. 14. Atoms of an element that have the same atomic number but different atomic masses are isotopes .
Detailed explanation-2: -Lithium, on the other hand, has just one of eight possible electrons in its outermost energy level (also energy level II).
Detailed explanation-3: -Sodium is more reactive than lithium because sodium is larger in size. Outermost electrons are less tightly held in sodium than in lithium. As a result, sodium loses its outermost electron more easily than lithium. Hence, it is more reactive than lithium.
Detailed explanation-4: -These elements, including hydrogen (H), lithium (Li) and sodium (Na), all have one electron in their outermost shells. That means that they can achieve a stable configuration and a filled outer shell by donating or sharing one electron with another atom.