MEDIUM
Earn 100

What are the uses of gamma rays?

Important Questions on Atomic Structure

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models

The scientist who discovered nucleus is _____.

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models

The stability of the atom could not be explained by _____ model. (Rutherford / Bohr)

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
_____ orbit has the lowest energy and is closest to the nucleus. K/ N
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
-1.6×10-19 coulomb is the charge of an _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Electrons revolve around the nucleus in a fixed circular path called_____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Rutherford's α-particle scattering experiment led to the discovery of the _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models

The part of an atom where most of the mass is concentrated is called _____.

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
The charge on the nucleus of an atom is positive because of the presence of _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models

Rutherford’s alpha-particle scattering experiment led to the discovery of the atomic _____.

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
In an atom, the electrons move in a circular path called _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Elements with a high atomic number such as uranium, thorium, radium have a property of spontaneously emitting invisible, highly penetrating and high energy radiation. This property is called _____. (radioactivity/ chemical decay/ nuclear fission)
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Rutherford's a-particle scattering experiment was responsible for the discovery of _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Almost all the mass of an atom is concentrated in a small region of space called the _____.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models

The lower energy state of an atom is called _____. (ground state / excited state)

EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Most of the space in an atom is occupied by _____ which have negligible mass.
 
MEDIUM
Physical Science>Chemistry>Atomic Structure>Atomic Models
The nucleus of an atom is surrounded by negatively charged particles called _____.
MEDIUM
Physical Science>Chemistry>Atomic Structure>Atomic Models
Rutherford showed that _____ rays come out of unstable nuclei. (cathode/ alpha)
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
The positively charged central part of the atom is called _____.
 
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
_____ atomic model is also called plum pudding model.
EASY
Physical Science>Chemistry>Atomic Structure>Atomic Models
Almost all the mass of an atom is concentrated in a small region, called _____.