Unit 2 Hindenburg Test Review

Front

What is the tiniest particle in the entire universe?

Back

Atoms are the smallest units of matter that retain the properties of an element.

Front

What are the substances at the beginning of a chemical equation called?

Back

Reactants are the starting materials in a chemical reaction.

Front

What happens to the temperature in an exothermic chemical reaction?

Back

The temperature increases as energy is released during the reaction.

Front

Which part of an atom is positively charged?

Back

Protons are the positively charged particles found in the nucleus of an atom.

Front

In a system, what does the toaster cooking the bread represent?

Back

The toaster represents the process in a system where input is transformed into output.

Front

What are the products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What is the role of neutrons in an atom?

Back

Neutrons are neutral particles that contribute to the mass of an atom and stabilize the nucleus.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.