Fill in the blanks by selecting the correct word from the brackets.
(ii) If an element has seven electrons in its outermost shell, then it is likely to have the _______ (largest/smallest) atomic size among all the elements in the same period.

Open in App

Solution

Atomic size
Atomic size basically refers to the radius of the atom. It increases down the group. Across a period the atomic radius first decreases and then increases.
When an element has 7 electrons in its valence shell, the effective nuclear charge will be higher. As a result, the nucleus would pull all the electrons towards itself and the atomic size thus would also decrease.
Thus, If an element has seven electrons in its outermost shell, then it is likely to have the smallest atomic size among all the elements in the same period.

Suggest Corrections

Similar questions

Q. The following questions refer to the Periodic Table.
(a) (i) Name the first and last element in period 2.
(ii) What happens to the atomic size of elements moving from top to bottom of a group?
(iii) Which of the elements has the greatest electron affinity among the halogens?
(iv) What is the common feature of the electronic configurations of the elements in group 7?

(b) Supply the missing word from those in the brackets:
(i) If an element has a low ionization energy then it is likely to be _________ (metallic/non-metallic).
(ii) If an element has seven electrons in its outermost shell then it is likely to have the ________ (largest/smallest) atomic size among all the elements in the same period.

(c) (i) The metals of Group 2 from top to bottom are: Be, Mg, Ca, Sr, Ba. Which of these metals will form ions most readily and why?
(ii) What property of an element is measured by electronegativity?

An element 'A' has two electrons in the outermost shell of its atom and combines with an element 'B' having seven electrons in the outermost shell, forming the compound $A B_{2}$ . The compound when dissolved in water, conduct electric current. Giving reasons, state the nature of the chemical bond in the compound.

Name

(a) three elements that have a single electron in their outermost shells.

(b) two elements that have two electrons in their outermost shells.

Q. Fill in the blanks by selecting the correct word from the brackets :
(i) If an element has a low ionization energy then it is likely to be _________ (metallic / non metallic).
(ii) If an element has seven electrons in its outermost shell then it is likely to have the _______ (largest / smallest) atomic size among all the elements in the same period.

If an element has seven electrons in its outermost shell then it is likely to have the …………….. (largest / smallest) atomic size among all the elements in the same period.

Join BYJU'S Learning Program

Fill in the blanks by selecting the correct word from the brackets.(ii) If an element has seven electrons in its outermost shell, then it is likely to have the _______ (largest/smallest) atomic size among all the elements in the same period.

Fill in the blanks by selecting the correct word from the brackets.
(ii) If an element has seven electrons in its outermost shell, then it is likely to have the _______ (largest/smallest) atomic size among all the elements in the same period.