Chemistry
Fill in the blanks:
Periods are _________ horizontal rows of elements in the periodic table and an element with three electron shells and two electrons in it's valence shell belongs to period _________ and group _________.
Periodic Table
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Answer
7
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3
Answer
2
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Related Questions
The element with the highest ionization potential from the elements of period 1, 2 and 3.
The element from the elements Li, Na, K which has maximum metallic character.
Fill in the blanks:
Across a period the valence electrons increase by _________ while down a subgroup they _________.
Fill in the blanks:
Across a period, the electropositive character _________ and down a group the electronegative character _________.