Physical Science Midterm 2024 Part 1

Front

What is the correct coefficient for O2 in the reaction: _____ KClO3 → _____ KCl + _____ O2?

Back

3

Front

Where are the Noble Gases located on the periodic table?

Back

Right side

Front

Why do scientists analyze the data collected during an experiment?

Back

To determine relationships between variables and to determine the reliability of the results.

Front

Where are Metalloids found on the periodic table?

Back

Along the stairway line

Front

In the reaction 2 H2 + O2 → 2 H2O, what is H2O classified as?

Back

Products

Front

What is the definition of a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of molecules involved in the reaction.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What is the definition of a product in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is the significance of the stair-step line on the periodic table?

Back

It separates metals from nonmetals and indicates the location of metalloids.

Front

What is the role of subscripts in a chemical formula?

Back

They indicate the number of atoms of each element in a molecule.