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प्रश्न
Write the full form of IUPAC.
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उत्तर
The full form of IUPAC is International Union of Pure and Applied Chemistry.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Molecule
Define: Relative atomic mass
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Give two examples for each of ionic and covalent bond.
Who originated the word ‘atom’ ?
Name the particle or particles you would expect to find in :
The orbit of an atom
Fill in the blank
A deficiency of electrons produces a ________ charge.
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.
Find the mass of 2 moles of nitrogen atoms.
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Electron, proton, neutron are the types of ______ in an atom.
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.
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.
In all atoms of an element
The first scientific theory about atoms was given by J J. Thomson.
