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प्रश्न
Name the particles which revolve around the nucleus.
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उत्तर
Electron.
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संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Fill in the blank:
Atoms are _____
Name two particles found inside the nucleus. What are they collectively called ?
Name three non-metals/radicals which have valency -1, -2, and -3.
Name the particle or particles you would expect to find in :
The orbit of an atom
Name the particle or particles you would expect to find in :
The nucleus of an atom
Fill in the blank
A charged particle is called an _____
What value has been given to the mass of this reference atom ?
What is an atom ? How do atoms usually exist ?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Define the following term:
Atom
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Name the sub-atomic particles.
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.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Which of the following has maximum number of atoms?
A change in the physical state can be brought about
______ is a substance that is made up of three oxygen atoms chemically combined.
Atoms have a radius of the order ______.
