SMS 2nd 9 Test Review 1 (2024-2025)

Front

What is the atomic number of an element?

Back

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

Front

How can you identify an atom using the periodic table?

Back

You can identify an atom by finding its atomic number on the periodic table, which corresponds to the number of protons.

Front

What is a theory in scientific terms?

Back

A theory is a well-substantiated explanation of an aspect of the natural world that is based on a body of evidence.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction, such as rusting.

Front

What happens during the rusting of iron?

Back

Rusting involves the formation of a new substance, iron oxide, as iron reacts with oxygen and moisture.

Front

What is the difference between a hypothesis and a theory?

Back

A hypothesis is a testable prediction, while a theory is a well-supported explanation based on evidence.

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent, typically measured in grams per liter.

Front

What does it mean if an observation does not change in an experiment?

Back

It means that the results are consistent and not affected by the quantity of the substances used.

Front

What is the significance of measuring the acidity of vinegar in an experiment?

Back

Measuring acidity helps determine the chemical properties of vinegar, which is important in various applications.

Front

What is the boiling point of a substance?

Back

The boiling point is the temperature at which a liquid turns into vapor.