Advertisements
Advertisements
Question
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Advertisements
Solution
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
APPEARS IN
RELATED QUESTIONS
Match the column A with Column B.
|
Column A |
Column B |
|
(i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride |
Covalent bond Ionic bond Covalent and coordinate bond |
State the type of bonding in the following molecule.
Calcium oxide
Name the following:
An element having valency 'zero'
Compare :
Sodium atom and sodium ion
State the type of bonding in the following molecules.
Calcium oxide
Element M forms a chloride with the formula MCl2 which is solid with a high melting point. What type of bond is in MCl2. Write the formula of the compound when M combines with sulphur, oxygen, and nitrogen.
The valency of noble gases is ______.
What is meant by a chemical bond?
Complete the following table:
| Atoms | Atomic number | Electron distribution | |
| 1. | O | 8 | ______ |
| 2. | N | ______ | ______ |
| 3. | ______ | 17 | ______ |
| 4. | ______ | ______ | 2,8,2 |
How many atoms of each kind are present in the following molecule:
water
