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प्रश्न
Define – Atom.
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उत्तर
An atom is the smallest particle of a chemical element that retains its chemical properties.
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संबंधित प्रश्न
Define:- Atom
Define:- Molecule
Define:- Radicals
Fill in the blank
An ion with negative charge is called _______
What does an atom consist of ? Explain.
What does the word ‘atom’ mean?
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Write the full form of IUPAC.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
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.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
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.
Define the following term with an example.
Metal
Define the following term with an example.
Non-metal
Which of the following statements made by Dalton has not undergone any change?
Does the solubility of a substance change with temperature? Explain with the help of an example.
