SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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it has 11 protons
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its atomic mass is 23
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it is a nonmetal
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it has one valence electron
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Detailed explanation-1: -Sodium (Na) is a highly reactive element. Which characteristic of sodium is responsible for its reactivity? 1.) It has 11 protons.
Detailed explanation-2: -The number of electrons in the outermost shell of an atom determines its reactivity.
Detailed explanation-3: -Sodium (Na) is an alkali metal; it is shiny and soft with a single electron in its outermost shell. Alkali metals are highly reactive because they readily lose their outermost electron.
Detailed explanation-4: -As sodium has an atomic number of 11, the first and second shell will be filled and the third shell will have 1 electron. Valence electrons (VE) are the electrons in the outer shell of an atom. Hence sodium has 1 valence electron.
Detailed explanation-5: -The number of valence electrons in atoms may cause them to be unreactive or highly reactive. For those atoms that are reactive, the number of valence electrons also determines whether they tend to give up or gain electrons in chemical reactions. Metals, which easily give up electrons, can conduct electricity.