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प्रश्न
Write the names of `"FeS"` compounds :
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उत्तर
`"FeS"` - Iron sulphide
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संबंधित प्रश्न
Define: Ions
Define: Mass number
What does an atom consist of ? Explain.
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Give two examples for each of ionic and covalent bond.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Name the three subatomic particles present in an atom.
What value has been given to the mass of this reference atom ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Electron, proton, neutron are the types of ______ in an atom.
K: Potassium:: C: ______.
Define – Atom.
Define the following term with an example.
Metal
Does the solubility of a substance change with temperature? Explain with the help of an example.
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 first scientific theory about atoms was given by J J. Thomson.
