Advertisements
Advertisements
प्रश्न
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
Advertisements
उत्तर
| Name of elements | Atomic number | Atomic mass |
No of proton |
No of electrons |
no.of neutrons |
Electronic configuration |
| `""^12""_6C` | 6 | 12 | 6 | 6 | 6 | 2, 4 |
| `""^16""_8O` | 8 | 16 | 8 | 8 | 8 | 2, 6 |
| `""^19""_9F` | 9 | 19 | 9 | 9 | 10 | 2, 7 |
| `""^20""_10Ne` | 10 | 20 | 10 | 10 | 10 | 2, 8 |
| `""_13""Al""^27` | 13 | 27 | 13 | 13 | 14 | 2, 8, 3 |
| `""_17""Cl""^35` | 17 | 35 | 17 | 17 | 18 | 2, 8, 7 |
| Carbon `""^12""_6C` |  |
| Oxygen `""^16""_8O` |  |
| Fluorine `""^19""_9F` |  |
| Neon `""^20""_10Ne` |  |
| Aluminium `""_13""Al""^27` |  |
| Chlorine `""_17""Cl""^35` |  |
APPEARS IN
संबंधित प्रश्न
With the help of given Table, find out the mass number of sulphur atom.
| Composition of Atoms of the First Eighteen Elements with Electron Distribution in Various Shells | ||||||||||
| Name of Element | Symbol | Atomic Number | Number of protons | Number of Neutrons | Number of Electrons | Distribution of Electrons | Valency | |||
| K | L | M | N | |||||||
| Hydrogen | H | 1 | 1 | - | 1 | 1 | - | - | - | 1 |
| Helium | He | 2 | 2 | 2 | 2 | 2 | - | - | - | 0 |
| Lithium | Li | 3 | 3 | 4 | 3 | 2 | 1 | - | - | 1 |
| Beryllium | Be | 4 | 4 | 5 | 4 | 2 | 2 | - | - | 2 |
| Boron | B | 5 | 5 | 6 | 5 | 2 | 3 | - | - | 3 |
| Carbon | C | 6 | 6 | 6 | 6 | 2 | 4 | - | - | 4 |
| Nitrogen | N | 7 | 7 | 7 | 7 | 2 | 5 | - | - | 3 |
| Oxygen | O | 8 | 8 | 8 | 8 | 2 | 6 | - | - | 2 |
| Fluorine | F | 9 | 9 | 10 | 9 | 2 | 7 | - | - | 1 |
| Neon | Ne | 10 | 10 | 10 | 10 | 2 | 8 | - | - | 0 |
| Sodium | Na | 11 | 11 | 12 | 11 | 2 | 8 | 1 | - | 1 |
| Magnesium | Mg | 12 | 12 | 12 | 12 | 2 | 8 | 2 | - | 2 |
| Aluminium | Al | 13 | 13 | 14 | 13 | 2 | 8 | 3 | - | 3 |
| Silicon | Si | 14 | 14 | 14 | 14 | 2 | 8 | 4 | - | 4 |
| Phosphorus | P | 15 | 15 | 16 | 15 | 2 | 8 | 5 | - | 3.5 |
| Sulphur | S | 16 | 16 | 16 | 16 | 2 | 8 | 6 | - | 2 |
| Chlorine | Cl | 17 | 17 | 18 | 17 | 2 | 8 | 7 | - | 1 |
| Argon | Ar | 18 | 18 | 22 | 18 | 2 | 8 | 8 | 0 | |
Give the following a suitable word/phrase.
Atoms of same element with same atomic number but a different mass number.
Multiple Choice Questions
The sub atomic particle with negative charge is
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
State the main postulates of Dalton’s atomic theory.
Define the term ‘atomic number’ of an atom.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Are isotopes atoms of the same element or different elements.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Do isotopes have the same atomic number or the same mass number?
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine.
