Advertisements
Advertisements
प्रश्न
Give reason
Argon does not react.
उत्तर
Argon does not react as it has the outermost orbit complete, i.e. 8 electrons in the outermost shell.
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?
A Compound 'X' consists of only molecules. Hence 'X' will have
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What is the formula of the compound formed between X and Z.
Explain
Octet rule for the formation of sodium chloride
State the type of bonding in the following molecules.
Calcium oxide
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^23_11Na}\]
______ is the only noble gas that does not have eight electrons in its valence shell.
The one which is composed of all the three kinds of bond.[ionic, covalent and coordinate bond]
