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प्रश्न
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
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उत्तर
Y
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संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
WRITE SHORT ANSWER
What is radioactivity?
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Who originated the word ‘atom’ ?
Define: An Atom:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
Fill in the blank
An _______ is electrically neutral.
Name the unit in which the radius of an atom is usually expressed.
In what respects do the three isotopes of hydrogen differ? Give their structures.
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.
The smallest particle of matter that can exist by itself is ______.
A compound containing one atom of carbon and two atoms of oxygen 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.
Write any two observations which support the fact that atoms are divisible.
Lead is also known as plumbum.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
