Question

The atomic radii of three elements P, Q and R of a period of the periodic table are 157 pm (picometre), 104 pm and 125 pm respectively. Giving a reason arrange these elements in the increasing order of atomic numbers in the period.

Answer 1

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Answer:

The increasing order is P,Q and R.

Explanation:

Since atomic size generally decreases along a period, as the atomic number (nuclear charge) increases thus, the element with smaller radii, has the highest atomic number. Hence, Q has the highest atomic number followed by R and P.

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