Alpha Scattering_Structure of the Atom

1. How many protons, neutrons, and electrons does a ³⁹₁₉K atom contain?

• A

• B

• C

• D

The diameter of a single sodium atom is calculated to be 3.8 x 10^-10 m. How many sodium atoms would fit side by side into 1m?

• 2.6 x 10^-11 Na atoms

• 2.6 x 10 ⁸ Na atoms

• 2.6 x 10⁹ Na atoms

• 2.6 x 10¹⁰ Na atoms

A mercury (Hg) atom has 80 protons, 80 electrons, and 120 neutrons. Which of the following is the correct symbol for Hg?

• ¹²⁰₈₀Hg

• ²⁰⁰₈₀Hg

• ⁸⁰₁₂₀Hg

• ⁸⁰₂₀₀Hg

Which conclusion can be drawn from the results of the experiment showing the scattering of α-particles by gold foil?

• Electrons orbit the atomic nucleus in well-defined paths.

• Nuclei of different isotopes contain different numbers of neutrons.

• The atomic nucleus contains protons and neutrons.

• The nucleus is very small compared with the size of the atom

Where are electrons, neutrons and protons found in an atom?

• A

• B

• C

• D

The table shows the number of protons, neutrons, and electrons in four atoms.

For which atom is the data correct?

• A

• B

• C

• D

The diagram represents an atom of an element. Which symbol gives this information?

• 
• 
• 
• 

A beam of particles contains neutrons, n, protons, p , and electrons, e.

The beam is passed between the charged plates.

Which diagram shows how the particles are affected by the plates?

• A

• B

• C

• D

Rutherford’s α particle scattering experiment revealed the existence of the atomic nucleus.

Which row in the table shows correctly the charges of α particles and atomic nuclei?

• A

• B

• C

• D