Chemistry and Physics Quiz

Which of the following statements about atomic structure is NOT true?

• Most of the volume of an atom is empty space.

• Electrons are the fundamental particle with a negative charge.

• The number of protons and neutrons in an atom must be equal.

• Protons are about 2000 times larger than electrons.

Which of the following statements about functional relationship is NOT true?

• Plotting (1,2), (2,4), (3,6) is an inverse function.

• Plotting (1,1), (2,4), (3,9) is a parabolic function.

• Plotting (1,2), (2,4), (3,8), (4,16) is an exponential function.

• Plotting (1,1), (2,0.25), (3,0.11) is an inverse square function.

What is [(8 x 10-5)(3 × 10⁹)]/(4 × 10-5)?

• 6 x 10⁹

• 6 x 10^-1

• 9.6 x 10¹⁰

• 6.6 x 10⁹

The atomic weights of the halogens are listed below. If you rounded to the nearest integer to perform a calculation of molar mass, which would have the largest error?

• F: 19.0 g/mol

• Cl: 35.45 g/mol

• Br: 79.9 g/mol

• I:126.9 g/mol

Express 22 pounds in mks units.

• 22 pounds

• 160 ounces

• 10 kg

• 48 kg

What is the correct order of increasing energy?

• microwaves, visible light, UV light, x-rays, gamma rays

• Microwaves, x-rays, gamma rays, visible light, UV light

• Microwaves, UV light, visible light, x-rays, gamma rays

• X-rays, gamma rays, microwaves, visible light, UV light

When a given molecule absorbs a photon of infrared (IR) radiation

• It promotes electrons into delocalized bonding orbitals

• It begins to vibrate

• It begins to rotate

• Its electrons are excited to higher energy levels.

Given what you know about the photoelectric effect, what occurs when 10 photons of 3 eV light strike a metal surface that has a 6 eV work function?

• Nothing happens

• 10 electrons are ejected from the metal

• 5 electrons are ejected from the metal

• 10 6-eV photons are ejected from the metal

The famous electron diffraction pattern is proof of what concept?

• Particles can exhibit wave-like properties

• The location and trajectory of electrons can be found

• EM radiation can exhibit wave like properties

• Electrons can spin when hit by microwave radiation

For a Bohr atom, which of the following transitions emits the highest energy photon?

• From n = 10 to n = 8

• From n = 4 to n = 3

• From n = 6 to n = 5

• From n = 2 to n = 1