Unit 3 Chemistry Practice Test 2023

Front

How many valence electrons does Carbon have?

Back

Carbon has 4 valence electrons.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with acids.

Front

What are nonmetals?

Back

Nonmetals are elements that are poor conductors of electricity and heat.

Front

What is an ionic bond?

Back

An ionic bond is the electrostatic attraction between two oppositely charged ions, typically formed when metals lose electrons and nonmetals gain electrons.

Front

What happens to water on the road when it freezes?

Back

When water on the road freezes, it undergoes a physical change.

Front

What is the definition of a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are the properties of metals?

Back

Metals are typically good conductors of heat and electricity, malleable, and ductile.

Front

What is the difference between a physical property and a chemical property?

Back

A physical property can be observed without changing the substance's identity, while a chemical property can only be observed during a chemical reaction.

Front

What is the role of valence electrons in chemical bonding?

Back

Valence electrons are involved in forming bonds between atoms, determining how atoms interact with each other.

Front

What is a cation?

Back

A cation is a positively charged ion that is formed when an atom loses one or more electrons.