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प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
पर्याय
True
False
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उत्तर
false
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संबंधित प्रश्न
Explain the Atomic number with example.
The composition of the nuclei of two atomic species X and Y are given as under
| X | Y | |
| Protons | 6 | 6 |
| Neutrons | 6 | 8 |
Give the mass numbers of X and Y. What is the relation between the two species?
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
Fill in the blanks.
Isotopes are the atoms of ______ element having the ______ atomic number but ______ mass number.
What is variable valency? Name two elements having variable valency and state their valencies.
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State Valency of each element
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State (i) Valency of each element (ii) which one is a metal (iii) which is non-metal (iv) which is an inert gas
What is meant by the 'atomic number of an element'?
Explain the following terms.
- Proton
- Electron
- Neutron.
Mass No =______ + No. of Neutrons.
