Review Flashcard for 7R Chemistry 2 Test

Front

What are the reactants in the equation N2 + H2 -> NH3?

Back

N2 + H2

Front

What observation indicates a chemical reaction has occurred when hydrogen peroxide breaks down?

Back

The temperature of the solution increases.

Front

What are the negatively charged particles in an atom?

Back

Electrons

Front

What particle orbits around the nucleus of an atom?

Back

Electron

Front

How many valence electrons are in an atom with 4 valence electrons?

Back

4

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products).

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a product in a chemical reaction?

Back

The substances formed as a result 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.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.