Chemistry
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the brackets to complete the following statements:
(i) The element B would have (lower/higher) metallic character than A.
(ii) The element A would probably have (lesser/higher) electron affinity than B.
(iii) The element A would have (greater/smaller) atomic size than B.
Answer
If the element are placed as B and then A in the 3rd period of the periodic table then
(i) The element B would have higher metallic character than A as metallic character decreases across a period.
(ii) The element A would probably have higher electron affinity than B as electron affinity increases across a period.
(iii) The element A would have smaller atomic size than B as atomic size decreases across a period.
Related Questions
Give one word or a phrase for the following statement: The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged ion.
Give reasons :
(i) Inert gases do not form ions.
(ii) Ionization potential increases across a period — left to right.
Choose the correct answer from the options A, B, C and D given :
The most electronegative element from the following elements is :
- Magnesium
- Chlorine
- Aluminium
- Sulphur
Fill in the blank:
In Period 3, the most metallic element is …………….. (sodium / magnesium / aluminium)