alleryWhat is the valency of an element with electronic configuration 2, 8, 3?
AThree
BTwo
CFive
DEight
Answer & Solution
Correct answer: A. Three
1. The element has 3 electrons in the outermost shell.
2. Valency for groups 1-2 and 13 is the number of valence electrons.
3. With 3 valence electrons, the element gives a valency of 3.
4. So the valency is three.
5. The element is aluminium with atomic number 13.
_Source: syllabus Science Ch 5 'Periodic Classification of Elements'_
Keep practising Periodic Classification of Elements
Browse all Periodic Classification of Elements questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
Which of the following set of elements is written in order of their increasing metallic chOn moving from left to right in a period in the periodic table, the size of the atom.Which one of the following does not increase while moving down the group of the periodic tWhich of the following elements will form an acidic oxide?Three elements B, Si and Ge areWhat type of oxide would Eka-aluminium form?Arrange the following elements in the order of their increasing non-metallic character Li,Arrange the following elements in the order of their decreasing metallic character Na, Si,