Chemistry Unit 2 Notes

This flashcard set covers key concepts and vocabulary from the Chemistry Unit 2 lecture notes, focusing on matter, its properties, and classification.

Chemistry

The study of matter and its composition, properties, interactions, and combinations.

Matter

Anything that has mass and takes up space (volume).

States of Matter

The three forms that matter can take: solid, liquid, and gas.

Atom

The basic unit of matter.

Air

Considered matter, as it has mass and occupies space.

Pure Substance

Matter with a definite composition and specific chemical properties.

Mixture

Different types of substances in the same container that can be separated and are not all bonded.

Molecule

Two or more atoms chemically bonded together.

Compound

Two or more different elements chemically bonded together.

Physical Property

A characteristic that can be observed or measured without changing the identity of the matter.

Chemical Property

A characteristic of matter observed as it changes to a different type of matter during a reaction.

Physical Change

Matter changes form or appearance but not its chemical composition.

Chemical Change

A reaction that creates new products with new compositions.

Periodic Table of Elements

A tabular arrangement of elements grouped by similar properties.

Metals

Elements characterized by high conductivity, malleability, ductility, and metallic luster.

Nonmetals

Elements that are typically poor conductors of heat and electricity and vary in state of matter at room temperature.

Homogeneous Mixture

A mixture that has a uniform composition throughout.

Heterogeneous Mixture

A mixture where the individual substances remain distinct.

Element Symbol

One or two letter representation of an element, where no number means there is ONE of that element bonded.

Chemical Formula

A way to represent the types and numbers of atoms in a molecule.