7th science MTR 2024

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides, but it does not mean that elements with the same atomic number are on both sides.

Front

What state of matter has no definite shape or volume?

Back

Gas.

Front

What is freezing classified as?

Back

Freezing is a physical property.

Front

What is a characteristic that can be observed or measured without changing the substance?

Back

Physical property.

Front

What is mass classified as?

Back

Mass is a physical property.

Front

What is the definition of a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction.

Front

What is the definition of a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing the substance.

Front

What is an example of a chemical change?

Back

Rusting of iron.

Front

What is an example of a physical change?

Back

Melting of ice.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.