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प्रश्न
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
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उत्तर
electrically neutral
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संबंधित प्रश्न
Define:- Molecule
Write the names of the elements present in the:-
Ammonia
Write the names of `("NH"_4)_2"SO"_4` compounds:
Fill in the blank:
Atoms are _____
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Define: An Atom:
What are the building blocks of matter ?
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Draw the electron dot structure of this compound.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
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.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
The smallest particle of matter that can exist by itself is ______.
The smaller particles found in the atom is called ______.
Define the following term with an example.
Metal
An element is composed of ______ atoms.
Define the term ions or radicals.
Give the salient features of “Modern atomic theory”.
