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प्रश्न
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
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उत्तर
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
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
How are isobars different from isotopes ?
Write the names of the elements present in the:-
Sodium hydroxide
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
How many times is a proton heavier than an electron?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Define the following term:
Atom
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
Define the following term with an example.
Element
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
The basic unit of matter is ______.
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.
An element is composed of ______ atoms.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
