Lesson 2 Flashcard Review

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number below the chemical symbol that indicates the number of atoms of that element in a molecule.

Front

How many atoms of Hydrogen are in H₂O?

Back

There are 2 atoms of Hydrogen in H₂O.

Front

What does the chemical formula CF₂Cl₂ represent in terms of atom count?

Back

C = 1, F = 2, Cl = 2.

Front

How many atoms of each element are in C₃H₅NO₃?

Back

C = 3, H = 5, N = 1, O = 3.

Front

Which of the following is NOT a molecule: CO₂, C, OH₂, P₂K₃?

Back

C is NOT a molecule.

Front

What does the chemical formula H₂O tell us about the composition of water?

Back

H₂O consists of 2 Hydrogen atoms and 1 Oxygen atom.

Front

Define a molecule.

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the significance of the coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of atoms bonded together.

Front

How many total atoms are in the molecule C₃H₅NO₃?

Back

There are 12 total atoms in C₃H₅NO₃ (3 Carbon, 5 Hydrogen, 1 Nitrogen, 3 Oxygen).