Advertisements
Advertisements
प्रश्न
Number of valence electrons in carbon is ______.
पर्याय
2
4
3
5
Advertisements
उत्तर
Number of valence electrons in carbon is 4
APPEARS IN
संबंधित प्रश्न
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
In term of electron transfer, define Oxidation
What type of bond is formed between two atoms, when the electronegative difference between them is low ?
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 |
Name an element which does not contain neutron.
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
Identify the following reaction as either oxidation or reduction:
Fe3+ + e- → Fe2+
Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.
The valency of noble gases is ______.
Complete the following table:
| a. | Dativebond | ______ |
| b. | CaH2 → Ca+H2 | ______ |
| c. | ______ | Reduction |
| d. | ______ | Redox reaction |
