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41
. . . . . . . . is the only non-metal present in group 1 of the modern periodic table?
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Answer: Option A
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42
Which one of the following properties changes with valency?
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Answer: Option B
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43
Which group of Periodic Table contains no metal?
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Answer: Option C
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44
In a group, the number of valence electrons . . . . . . . .
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Answer: Option A
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45
In the periodic table, aluminium is related to the diagonal . . . . . . . .?
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Answer: Option B
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46
From the given options, fill in the blanks using the correct option for the following statement . . . . . . . . the element has the greatest tendency to lose electrons.
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Answer: Option C
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47
Which is the only non-metal present on the left in the modern periodic table?
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Answer: Option C
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48
O, S and Se what is the correct sequence of atomic sizes of these elements?
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Answer: Option B
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49
Where are metals placed in the modern periodic table?
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Answer: Option D
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50
Are the minimum reactive elements of the periodic table.
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Answer: Option C
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