Advertisements
Advertisements
प्रश्न
The electron shell ______ is nearest to the nucleus.
Advertisements
उत्तर
The electron shell K is nearest to the nucleus.
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 |
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Atom
Write the names of the elements present in the:-
Ammonia
Fill in the blank
An ion with negative charge is called _______
Define: Relative atomic mass
What does an atom consist of ? Explain.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
State two observations which show that atom is not indivisible.
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Define the following term:
Atom
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Name the sub-atomic particles.
Atoms of different elements having the same number of ______ are called isotones.
A change in the physical state can be brought about
Lead is also known as plumbum.
The first scientific theory about atoms was given by J J. Thomson.
