GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A student hypothesizes that bromine (Br) has different chemical properties from krypton (Kr). The periodic table supports this hypothesis by indicating that-
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bromine is a metal while krypton is a nonmetal
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one mole of bromine is heavier than one mole of krypton
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bromine and krypton are members of the same family
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bromine and krypton have different numbers of valence electrons
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Explanation:
Detailed explanation-1: -They all have the same number of valence electrons, which is eight.
Detailed explanation-2: -Element having atomic number 35 is bromine. Both chlorine and bromine lies in the same group therefore they have similar properties.
Detailed explanation-3: -The most reactive metal element is cesium (Cs). It is located near the bottom left of the periodic table in the sixth row and group 1A (group 1). The cesium atom is very large with very low electronegativity. There is a single valence electron that is very easy to remove.
There is 1 question to complete.