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प्रश्न
Define the following term with an example.
Metal
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उत्तर
Metal: A chemical element that is an effective conductor of electricity and heat can be defined as a metal.
Ex.: Copper, Iron, Silver, etc.
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Write the names of the elements present in the:-
Acetic acid
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1. first shell
2. second shell
3. third shell and
4. fourth shell
Who originated the word ‘atom’ ?
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Fill in the blank
A charged particle is called an _____
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
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Define the following term with an example.
Element
State true or false. If false, correct the statement.
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State true or false. If false, correct the statement.
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K: Potassium:: C: ______.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
Define the following term with an example.
Non-metal
Atoms of one element can be transmuted into atoms of other elements by ______
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
