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2026 /
Quiz 1

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MDCAT Practice Test - Practice Test - Chemistry - Atomic Structure - 2026 Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Chemistry - Atomic Structure (Year 2026) | Quiz 1

1. Who discovered the proton?

Eugen Goldstein
J.J. Thomson
Ernest Rutherford
James Chadwick

2. What are the properties of a proton?

+1 charge, 1 amu
-1 charge, 1 amu
0 charge, 1 amu
+1 charge, negligible mass

3. What are canal rays?

Positive ions
Electrons
Neutrons
Alpha particles

4. How does the e/m ratio of a proton compare to that of an electron?

Smaller than electron's e/m
Larger than electron's e/m
Same as electron's e/m
Zero

5. What type of cathode was used in Goldstein's canal ray experiment?

Perforated cathode
Solid cathode
Perforated anode
Solid anode

6. What does Planck's quantum theory state about energy?

Energy is continuous
Energy is quantized
Energy is constant
Energy is zero

7. What is the particle-like packet of light energy called?

Photon
Electron
Proton
Neutron

8. What is the value of Planck's constant?

6.626 × 10⁻³⁴ J·s
6.626 × 10⁻³⁴ J
6.626 × 10⁻³⁴ s
6.626 × 10⁻³⁴ J/Hz

9. What is the correct formula for photon energy?

E = hν
E = h/ν
E = ν/h
E = hcλ

10. Calculate the energy of a photon of frequency 5.0×10¹⁴ Hz (h=6.626×10⁻³⁴ J·s).

3.31×10⁻¹⁹ J
1.33×10⁻¹⁹ J
6.63×10⁻¹⁹ J
5.00×10⁻¹⁹ J

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