Q14 of 52 Page 38

Which of the following elements would lose an electron easily?

Potassium (K) is more electropositive and hence ionizes easily than sodium (Na) due to bigger size and less electronic attraction. As we move down a group in periodic table, the size of the atom increases and the ionization potential decreases. So, potassium releases electrons easily than Na, Mg and Ca.

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12

Which of the following gives the correct increasing order of the atomic radii of O, F and N?

 13

Which among the following elements has the largest atomic radii?

 15

Which of the following elements does not lose an electron easily?

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Which of the following are the characteristics of isotopes of an element?

(i) Isotopes of an element have same atomic masses.


(ii) Isotopes of an element have same atomic number.


(iii) Isotopes of an element show same physical properties.


(iv) Isotopes of an element show same chemical properties.