Assertion : The number of electrons donated (or) accepted by an atom of an element so as to have 8 electrons in its outermost orbit is called valency. Reason : The metallic ions formed by the donating 3 electrons from their outermost orbit are called trivalent electropositive ions. *1. Both A and R are true and R is the correct explanation of A.2. Both A and R are true but R is NOT the correct explanation of A.3. A is true but R is false.4. A is false but R is true.5. Both A and R are false​

aditya , 4 Years ago

Grade 12