Chem - Chpt 1 - (Chemistry and Measurements)

What is chemistry?

Chemistry is the study of matter and the changes it undergoes, essential for understanding the material world.

Define matter and its three main states.

Matter is anything that has mass and occupies space. It exists in three main states: solid, liquid, and gas.

Distinguish between physical and chemical properties of matter.

Physical properties can be observed without changing the composition of matter. Chemical properties are only observed during a chemical change.

What is an element?

Elements are pure substances that cannot be broken down into simpler substances.

What is a compound?

Compounds are formed by combining two or more elements in fixed ratios.

What is a mixture?

Mixtures are physical blends of two or more components, each retaining its own identity and properties.

Why are measurements important in chemistry?

Measurements are crucial in experiments for obtaining accurate and precise data.

What units of measurement are commonly used in chemistry?

Common units include the metric system and SI units.

What do significant figures in measurements indicate?

Significant figures indicate the precision of a measured quantity.

List the key components of the scientific method.

The scientific method involves observations, hypotheses, experiments, and theory in a systematic, rational, and empirical approach to solve problems.

What happens in a chemical reaction?

Chemical reactions involve the transformation of reactants into products.

How are chemical reactions represented?

Chemical reactions are represented by equations that use symbols and formulas to depict the substances involved.