CI Review (Physical Science)

Front

What is the atomic structure of a neutral atom?

Back

A neutral atom has an equal number of protons and electrons, resulting in no overall charge. The number of neutrons can vary, contributing to different isotopes.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be found by subtracting the atomic number (number of protons) from the mass number (total number of protons and neutrons).

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the transformation of substances through the breaking and forming of chemical bonds, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-5

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio.

Tags

NGSS.MS-PS1-1

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is an open system in a chemical reaction?

Back

An open system is one where matter can enter or leave the system, allowing for the exchange of substances with the surroundings.

Front

What is a closed system in a chemical reaction?

Back

A closed system is one where no matter can enter or leave, meaning the total mass remains constant during the reaction.

Tags

NGSS.MS-PS1-5

Front

What happens to the mass of reactants and products in a chemical reaction?

Back

The mass of the reactants before the reaction is equal to the mass of the products after the reaction, according to the law of conservation of mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of water in chemical reactions?

Back

Water can act as a reactant, solvent, or medium for chemical reactions, influencing the reaction rate and products formed.