Chemistry - Study Mode

[#671] All isotopes of the same element have ________
Correct Answer

(C) The same atomic number but different atomic masses

Explanation

Solution: All isotopes of the same element have the same atomic number but different atomic masses.

[#672] The fundamental particles present in the nucleus of an atom are
Correct Answer

(B) Proton, neutron

Explanation

Solution: The nucleus is the positively charged centre of an atom and contains most of its mass. It is composed of protons, which have a positive charge, and neutrons, which have no charge.

[#673] J.J. Thomson’s proposed model of atom is generally called ________ model.
Correct Answer

(B) Plum and pudding

Explanation

Solution: J.J. Thomson’s proposed model of atom is generally called plum and pudding model.

[#674] What particles move around the nucleus of an atom and are negatively charged?
Correct Answer

(A) Electrons

Explanation

Solution: Electrons are negatively charged particles that generally orbit the nucleus of an atom. Electrons are much smaller than protons or neutrons.

[#675] All isotopes of the same element have ______________
Correct Answer

(C) The same atomic number but different atomic masses