Atomic Radii and Ionization Energy (Group 1)

Q.

The atomic size of an element is ---------

1. Directly proportional to the nuclear charge

2. Directly proportional to the number of valence electrons

3. Inversely proportional to the number of core electrons

4. Inversely proportional to the effective nuclear charge

Q.

The element which has the greatest atomic radius is:

1. Chlorine

2. Magnesium

3. Phosphorus

4. Sodium

Q.

The ionic radii of alkali metal ions in water (hydrated radii) are in the order

1. $L{i}^{+}>N{a}^{+}>K^{+}>R{b}^{+}<C{s}^{+}$
2. $L{i}^{+}(aq.)>N{a}^{+}(aq.)>K^{+}(aq.)>R{b}^{+}(aq.)>C{s}^{+}(aq.)$
3. $L{i}^{+}<N{a}^{+}>K^{+}>R{b}^{+}>C{s}^{+}$
4. $L{i}^{+}(aq.)>N{a}^{+}(aq.)<K^{+}(aq.)<R{b}^{+}(aq.)<C{s}^{+}(aq.)$

Q. Group IA atoms are largest in their horizontal period, because of

1. Highly effective nuclear charge
2. Least effective nuclear charge
3. No nuclear charge
4. None of the above.

Q. The atomic radii of alkali metals decreases as we go down the group.

1. False
2. True

Q. Group IA atoms are largest in their horizontal period, because of

1. Highly effective nuclear charge
2. Least effective nuclear charge
3. No nuclear charge
4. None of the above.

Q. As we go along the period the atomic size decreases.

1. True
2. False

Q. The atomic radii of the group IA elements as we go down the group.

1. remains constant
2. decrease
3. increases

Q. As we go along the period the atomic size decreases.

1. True
2. False

Q. Atomic size of gold is almost the same as that of silver due to:

1. Almost the same electropositive character of two metals
2. The transition metals contraction in a series
3. The effect of lanthanide contraction
4. The same crystal structure of silver and gold