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प्रश्न
Write any two observations which support the fact that atoms are divisible.
उत्तर
With the discovery of electrons and protons it was established that atom is divisible and is made up of negatively charged electrons and positively charged protons along with some neutral particles called neutrons.
APPEARS IN
संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
WRITE SHORT ANSWER
Define an ionic compound.
Define:- Radicals
Write the names of the elements present in the:-
Glucose
Fill in the blank:
Atoms are _____
Define: Ions
What does an atom consist of ? Explain.
How did Neils Bohr visualise the atom ?
Name the particle or particles you would expect to find in :
The orbit of an atom
Name the three subatomic particles present in an atom.
Define the following term:
Atom
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Name the sub-atomic particles.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Atoms of different elements having the same number of ______ are called isotones.
The number of atoms present in a molecule is called its ______.
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
The ______ are combination of atoms of various elements or the same element.
