Chemical Formulas, Elements, Mixtures, Compounds, Atoms, and Molecules

Flashcards from lecture notes on chemical formulas, elements, mixtures, compounds, atoms, and molecules.

What is the chemical formula for water?

H2O

Is water a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for carbon dioxide?

CO2

Is carbon dioxide a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for oxygen?

O2

Is oxygen an element, molecule, or both?

Both an element and a molecule

What is the chemical formula for hydrogen?

H2

Is hydrogen an element, molecule, or both?

Both an element and a molecule

What is the chemical formula for methane?

CH4

Is methane a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for sodium chloride?

NaCl

Is sodium chloride a compound, molecule, or both?

Compound

What is the chemical formula for hydrochloric acid?

HCl

Is hydrochloric acid a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for sulfuric acid?

H2SO4

Is sulfuric acid a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for nitric acid?

HNO3

Is nitric acid a compound, molecule, or both?

Both a compound and a molecule

What is the chemical formula for ammonia?

NH3

Is ammonia a compound, molecule, or both?

Both a compound and a molecule

What is an element?

A substance that contains 1 type of atom.

What is a mixture?

A substance that contains more than one type of particle, not chemically bonded.

What is a compound?

A substance that contains 2 or more types of atoms chemically bonded.

What is an atom?

The smallest part of an element that cannot be broken down.

What is a molecule?

More than 1 atom chemically bonded.

Where are elements found?

Only elements are found on the periodic table.

Can the proportions of substances in a mixture change?

Yes, the proportions of substances in a mixture can change.

Do compounds have a fixed proportion of elements?

Yes, compounds have a fixed proportion of elements, which is represented by a chemical formula.