Final Exam Preparation

Front

What is the rate at which work is done called?

Back

Power

Front

What word did the Greek philosopher Democritus coin for a tiny piece of matter that cannot be divided?

Back

Atom

Front

According to the law of conservation of mass, what remains the same on both sides of a chemical equation?

Back

The number of atoms of each element.

Front

How would you classify the reaction 2Cu + O₂ → 2CuO + 315 kJ in terms of energy?

Back

Exothermic

Front

Why were protons discovered before neutrons?

Back

Protons have a positive charge, making them easier to detect than neutrons, which have no charge.

Front

What is energy?

Back

The ability to do work or cause change.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases energy to its surroundings.

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.