Protons

Q. The charge of electron and proton are and coulomb respectively.

1. $-1.6\times {10}^{-19}$
2. $+1.6\times {10}^{-19}$
3. $+9.1\times {10}^{-31}$
4. $-1.6\times {10}^{-27}$

Q. Write a brief note on protons.

Q.

The atomic particle having unit positive charge is called a/an

1. electron

2. proton

3. neutron

4. none of these

Q. Which subatomic particles have approximately the same mass?

1. Protons and neutrons
2. Electrons and nucleons
3. Protons and electrons
4. Electrons and neutrons

Q. Protons were discovered by ______.

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

Q. Which subatomic particles have approximately the same mass?

1. Electrons and nucleons
2. Protons and electrons
3. Protons and neutrons
4. Electrons and neutrons

Q. _____ number of protons are present in an element X with an atomic number Z and mass number A.

1. A
2. A-Z
3. Z
4. A+Z

Q. Charge of a proton is -1.6*10^-19C

1. True
2. False

Q.

Complete the following table relating to the atomic structure of the element:

Element	Atomic No.	Mass No.	No. of protons	No. of neutrons	No. of electrons
Aluminium		27			13

Q.

Isotopes have same number of protons but different number of neutrons.

1. True
2. False

Q. Statement 1: Two different elements can have same number of protons.
Statement 2: The atomic number is the number of protons in an atom.

1. Both statements are true.
2. Both statements are false.
3. Only statement 1 is true.
4. Only statement 2 is true.

Q. Which of the following statements are correct regarding the electrical charge of electrons and protons?

1. Electrons are positively charged.
2. Electrons are negatively charged.
3. Protons are positively charged.
4. Protons are negatively charged.

Q. Proton has a charge of $\times$ ${10}^{-19}$ C

1. 1.6022
2. -1.6022
3. -9.1094

Q. Hydrogen atom has three isotopes

1. True
2. False

Q. The atomic number of an atom is 30 and its mass number is 60. Which of the following is correct?

1. Number of electrons = 30
2. Number of neutrons = 29
3. Number of protons = 39
4. Number of neutrons = 19