Advertisements
Advertisements
प्रश्न
The electronic configurations of four particles A, B, C and D given below:
| A | 2, 8, 8 |
| B | 2, 8, 2 |
| C | 2, 6 |
| D | 2, 8 |
Which electronic configuration represents:
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion
(iv) chloride ion?
उत्तर
(i) Electronic configuration of particle B represents magnesium atom because its atomic number is 12.
(ii) Electronic configuration of particle C represents oxygen atom because its atomic number is 8.
(iii) Electronic configuration of particle D represents sodium ion. Atomic number of sodium is 11 and it loses one electron to stabilise and forms sodium ion containing 10 electrons.
(iv) Electronic configuration of particle A represents chloride ion. Atomic number of Chlorine is 17 and it gains one electron to stabilise and forms chloride ion containing 18 electrons.
APPEARS IN
संबंधित प्रश्न
Which of the following can be beaten into thin sheets?
State why concentrated sulphuric acid is not used for drying ammonia gas
Name one metal which is stored in kerosene oil.
State any three differences between the physical properties of metals and non-metals.
State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.
`N+—→ N^3-`
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Name:
two non metals which are monoatomic
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
Complete the statement given below, by filling in the blank with the correct word:
A metal which floats on water _____
