Discovery of Neutrons

Q.

Cathode rays are negatively charged particles because they are attracted to the ___ plate of the cathode ray tube.

Q.

Which of the following is not isoelectronic with $O^{-2}$?

1. $N^{-3}$

2. $N{a}^{+}$

3. $F^{-}$

4. $T{i}^{+}$

Q.

Statement 1: Number of neutrons is always greater than or equal to the number of protons in any given atom except hydrogen.
Statement 2: Number of electrons is always equal to the number of protons in a neutral atom.

1. Statements 1 and 2 are true and statement 2 is the right explanation of statement 1

2. Statements 1 and 2 are true but statement 2 is not the right explanation of statement 1

3. Statement 1 is false
4. Statement 2 is false

Q. The radius of an atomic nucleus is of the order of?

1. ${10}^{-10}cm$
2. ${10}^{-13}cm$
3. ${10}^{-15}cm$
4. ${10}^{-8}cm$

Q.

A/An ___ is not deflected by any magnetic or electric field.

Q.

Why did the discovery of neutrons came very late?

1. Neutrons are present in nucleus

2. Neutrons are highly unstable particles

3. Neutrons do not have

4. Neutrons are charge less

Q.

Which of the following particles are present in the nucleus of a helium atom?

1. Neutrons

2. Protons

3. Both protons & neutrons

4. Electrons

Q. The number of electrons in a neutral atom is equal to the ___.

1. atomic number
2. mass number
3. atomic weight
4. valence number

Q. Who discovered the subatomic particle called neutron?

1. Rutherford
2. J.J Thomson
3. E. Goldstein
4. Chadwick

Q.

Who among the following discovered the subatomic particles called neutrons?

1. E.Goldstein

2. James Chadwick

3. J.J Thomson

4. Rutherford

Q. Neutrons are positively charged

1. False
2. True

Q. The number of neutrons present in carbon-14 are _______.

1. 14
2. 8
3. 6
4. 12

Q.

Which of the following is correct?

1. Electrons carry a negative charge

2. Electrons carry a positive charge

3. Protons carry a positive charge

4. Protons carry a negative charge