Advertisements
Advertisements
Question
How many times is a proton heavier than an electron?
Solution
We know,
Mass of an electron = 9.1 × 10–31 kg
Mass of a proton = 1.6 × 10−27 kg
Thus, a proton is 1840 times heavier than an electron.
APPEARS IN
RELATED QUESTIONS
Define:- Atom
Write the names of `"FeS"` compounds :
Define: An Atom:
Fill in the blank
An excess of electrons produces a ________ charge.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
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?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
K: Potassium:: C: ______.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
In the nucleus of `""_20"Ca"^40`, there are ______
Give the salient features of “Modern atomic theory”.
Which of the following has maximum number of atoms?
A change in the physical state can be brought about
The first scientific theory about atoms was given by J J. Thomson.
Atoms have a radius of the order ______.
