Chemistry weekly quiz

1. Sort these from lowest to highest energy 

Ultraviolet, Infrared, Radio, Green visible, red visible, Gamma Ray, Microwave

• Radio

• Microwave

• Infrared

• Red visible

• Green visible

• Ultraviolet

• Gamma Ray

1. Sort these from shortest to longest wavelength

Blue visible, microwave, x-ray, yellow visible, radio, ultraviolet

• X-ray

• Ultraviolet

• Blue visible

• Yellow visible

• Microwave

• Radio

1. Which of these is NOT a greenhouse gas?

   1. Water

   2. Carbon monoxide

   3. Carbon dioxide

   4. Methane

1. Carbon monoxide

1. When the Earth’s surface is heated it re-radiates which type of electromagnetic radiation?

   1. Visible

   2. Radio

   3. Ultraviolet

   4. Infrared

infrared

1. What is FALSE about catalysts?

   1. They speed up chemical reactions

   2. They are used up in chemical reactions

   3. The destruction of ozone can be sped up with a carbon radical catalyst

   4. The destruction of ozone can be sped up with a chlorine radical catalyst

1. They are used up in chemical reactions

1. The “particle” of light is called a

   1. Wavelength

   2. Proton

   3. Photon

   4. Electron

photon

1. In the double slit experiment a single electron is “fired” through two slits and hits a screen. Which statement is true?

a.       After many, many electrons are fired, two distinct bands are observed on the screen. Marbles would show the same pattern.
b.     After many, many electrons are fired, an interference pattern emerges. Marbles would show the same pattern.
c.       After many, many electrons are fired, an interference pattern emerges. Light from a laser would show the same pattern.
d.       After many, many electrons are fired, two distinct bands are observed on the screen. Light from a laser would show the same pattern.

. After many, many electrons are fired, an interference pattern emerges. Light from a laser would show the same pattern.

According to the energy level diagram what sequence of photons could be emitted from an electron moving from energ level 5 to energy level 1
5ev and then 11ev
8ev and then 8eV
5 ev 8ev and then 3 ev
all of the above

all of the above

What is the best description of the Bohr model of the atom?

• The atom consists of a positively charged material with negatively charged electrons embedded within it.

• The atom consists of a nucleus with electrons orbiting randomly around it.

• The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels.

• The atom consists of a nucleus surrounded by a region containing electrons. Electrons cannot be located exactly within this region, but the probability that they will be found in an area can be stated.

The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels.