WorksheetsChemistry Quick Review
Total questions: 11
Worksheet time: 10mins
Which statement does NOT correctly compare silicon with another element?
Silicon is a better conductor of electricity than sulfur.
Silicon conducts electricity as well as copper does.
Silicon is a solid at room temperature, but argon is a gas.
Silicon is less malleable than silver.
A chemist made the table below to record some atomic properties of four elements.
Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?
Boron is the most reactive because it has the most protons.
Fluorine is the most reactive because it has 7 electrons in the outer shell.
Silicon is the most reactive because it has an equal number of protons and neutrons.
Gallium is the most reactive because it has many more neutrons than protons.
What is the total number of protons, neutrons, and electrons in a cadmium, Cd, atom that has a mass number of 112?
(a)
A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?
Hot water heated the aluminum foil.
The liquid solution changed color.
The pan was lined with aluminum foil.
The hot water cooled.
6
12
24
36
In a neutral atom,
protons = electrons
protons = neutrons
neutrons = electrons
protons = neutrons = electrons
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
Found orbiting outside the nucleus, this subatomic particle has a negative charge.
Neutron
Proton
Electron
Idontknowatron
Which chemical reaction involves the fewest oxygen atoms?
