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प्रश्न
Fill in the blank:
Atoms are _____
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उत्तर
Atoms are neutral.
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संबंधित प्रश्न
Define: Chemical bond
Give the charge and the mass of an electron, proton and neutron present in an atom ?
What are orbits or shells ?
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 particle or particles you would expect to find in :
The nucleus of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
What value has been given to the mass of this reference atom ?
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.
Find the mass of 2 moles of nitrogen atoms.
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
Draw the structure of an atom and explain the position of the sub-atomic particles.
______ is the smallest particle of an element.
1 mole of Gold and Silver contain same number of atoms.
The graphite refill used is pencil is made of element called ______.
