Compounds and Mixtures

What are molecules?

• Small particles formed when two or more atoms bond chemically.

• Large organelles inside the cell.

• Complex compounds of proteins only.

• Basic units of heredity in living organisms.

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-1

What is the sum of the atomic masses of all the atoms in a molecule called?

• Molecular weight

• Atom sum

• Nuclear mass

• Isotopic weight

What are isomers?

• Compounds with the same molecular formula but different arrangements of atoms

• Compounds that have entirely different molecular formulas

• Compounds with the same molecular formula and identical arrangements of atoms

• Compounds with similar physical properties but different chemical properties

A substance that has the same physical properties throughout and consists of only one type of atom, one type of molecule, or one nonmolecular compound is a ____.

• pure substance

• mixture

• alloy

• solution

What is a homogeneous substance?

• A substance with uniform composition throughout its volume.

• A substance with non-uniform composition.

• A substance that consists of different parts.

• A substance that has distinctly separated phases or components.

What are mixtures?

• A combination of two or more substances that are not chemically bonded together.

• A substance made of only one type of element.

• A compound where chemical reactions have formed new substances.

• A pure substance with a fixed composition.

What are solutions?

• A homogeneous mixture composed of two or more substances.

• A mixture of solids that do not dissolve.

• A heterogeneous mixture.

• A type of chemical equation.

What are dissolved substances known as?

• Solutes

• Solutions

• Solvents

• Solvates

What are solvents?

• Substances that dissolve other substances.

• Substances that do not interact with any compounds.

• Insolvent materials.

• Solid compounds that do not dissolve in any liquid.

A substance that is mixed, but not fully mixed is a ____.

• heterogeneous mixture

• homogeneous mixture

• solution

• compound