GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Have nothing to do with each other
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Increase by 1 atomic number as you move up
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Decrease by 2 atomic number as you move up
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have similar properties and the same number of valence electrons
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Detailed explanation-1: -The physical and chemical properties of elements depend on the number of valence electrons. Elements present in the same group have the same number of valence electrons. Therefore, elements present in the same group have similar physical and chemical properties.
Detailed explanation-2: -The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
Detailed explanation-3: -They will react with different elements in the same way and the molecular formula of their compounds will be similar. Hence, they have the same chemical properties.
Detailed explanation-4: -Answer and Explanation: Elements that are in the same column, or group of the periodic table, have the same number of valence electrons.