SUBATOMIC PARTICLES

Which of the following subatomic particles determine the identity of an

atom?

• A. protons

• B. neutrons

• C. protons plus neutrons

• D. electrons plus protons

An atom of an element is electrically neutral because the number of protons

is equal to the number of _____________.

• A. electrons

• B. neutrons

• C. nucleons

• D. nucleus

Tags

NGSS.MS-PS1-1

Which particles have approximately the same size and mass?

• A. protons and neutrons

• B. electrons and protons

• C. neutrons and electrons

• D. None because all are different in terms of size and mass

Which two particles would be attracted to each other?

• A. protons and neutrons

• B. electrons and protons

• C. electrons and neutrons

• D. All particles are attracted to each other.

Which of the following statements are TRUE about the subatomic particles?

I. The charge of electron is opposite to the charge of proton.

II. Proton has approximately the same mass with neutron.

III. Electrons and protons are located within the nucleus.

IV. The mass of an atom is concentrated at the nucleus.

• A. I, II, and III

• B. I, II, and IV

• C. I, III, and IV

• D. I, II, III, and IV

What was Thomson's atomic model called?

• A. Spherical Model

• B. Solar System Model

• C. Plum Pudding Model

• D. Model of the Atomic Theory

Which of the following statements BEST describes the location of electrons in

Rutherford’s model of the atom?

• A. The electrons are inside the nucleus.

• B. The electrons are outside the nucleus.

• C. There are no electrons in the Rutherford Model.

• D. Electrons are both inside and outside of the nucleus.

How do we call the protons and neutrons that are found together in the

nucleus?

• A. nuclei

• B. nucleons

• C. atomic mass

• D. mass number

What observations in the gold foil experiment made Rutherford conclude that

atoms are mostly empty space?

• A. Some alpha particles were deflected at smaller angles.

• B. Most alpha particles passed through the gold foil undeflected.

• C. Few alpha particles deflected almost back towards the source.

• D. Very few particles were deflected from their path, indicating that the

  positive charge of the atom occupies very large space.

What conclusion did Rutherford’s gold foil experiment lead to?

• A. Atoms are indivisible.

• B. Neutrons are located in the nucleus.

• C. Atoms contain a positively charged nucleus.

• D. Electrons move in definite energy levels called shells.