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प्रश्न
Draw the structure of an atom and explain the position of the sub-atomic particles.
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उत्तर
Structure of an atom.
Position of the subatomic – particles.
Atom consist of three sub-atomic.
Particles: 1. Protons, 2. Electrons, 3. Neutrons
- The nucleus of the atom contains the protons (positively charged) and the neutrons (no change)
- The outermost regions of the atom are called electron shells and contain the electrons (negatively charged)
- The protons have a positive charge while neutrons have a neutral charge.
- Electrons circle around the nucleus of an atom, they are negatively charged.
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संबंधित प्रश्न
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
Who originated the word ‘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 mass number of X?
Fill in the blank
An excess of electrons produces a ________ charge.
What are the building blocks of matter ?
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.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Electron, proton, neutron are the types of ______ in an atom.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
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The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
1 mole of Gold and Silver contain same number of atoms.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
Atoms have a radius of the order ______.
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