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प्रश्न
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
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उत्तर
X
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संबंधित प्रश्न
Define:- Atom
Fill in the blank
An ion with positive charge is called ______
Name the particles which revolve around the nucleus.
What are orbits or shells ?
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Define: Covalent bond
Fill in the blank
An _______ is electrically neutral.
State two observations which show that atom is not indivisible.
Which of the following statement is correct about the atom of an element ?
Find the mass of 2 moles of nitrogen atoms.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
The basic unit of matter is ______.
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
______ is the smallest particle of an element.
Define the term ions or radicals.
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
The first scientific theory about atoms was given by J J. Thomson.
