Classifying Matter Test Review

Most reactive elements on the Periodic Table; includes Li, Na, K

Identify #4

Suggested all matter is formed from “uncuttable” small pieces; Greek philosopher

Which of the following is NOT an element?

The average mass of all the isotopes of an element.

A pure substance that cannot be broken down into other substances by chemical or physical means

Which of these is NOT a region of an atom in which electrons are likely to be found.

A mixture in which different materials are distributed unevenly

The sum of protons and neutrons in the nucleus of an atom.

The two types of matter are

An arrangement of the elements showing the repeating pattern of their properties.

Identify #1

Elements in the same vertical column of the periodic table

A mixture in which different materials are blended evenly is a

A substance made of of two or more elements chemically combined in a set ratio is a

Identify #7

Identify #10

The number of protons in the nucleus of an atom.

Which of the following is NOT a heterogeneous mixture?

The smallest group on the Periodic Table

Developed the model of the atom in which electrons orbit the nucleus in energy levels

Formed the atomic theory model of the atom; English schoolteacher

Identify #2

The basic particle from which all elements are made

Two or more substances that are together in the same place but not chemically combined?

An element is identified by its number of

Discovered the neutron

The largest group of the Periodic Table

Less reactive metals, used in jewelry and building materials

An atom with the same number of protons and a different number of neutrons.

Identify #6

The two types of matter are

Identify #3

Fairly reactive elements, all but one is a nonmetal, have seven valance electrons

The mass number can be calculated by adding

A horizontal row of elements in the periodic table.

A tiny, negatively charged particle that moves around the outside of the nucleus of an atom.

Identify #9

Which of the following is NOT a homogeneous mixture?

Which of the following is NOT a compound?

The smallest unit of a compound is called a(n)

The atomic number is based on the number of

Correctly match the following subatomic particles to their charges: neutron, electron, proton

Fairly reactive elements, never found uncombined in nature, important minerals for our body

The force of attraction that holds two atoms together is a

A mixture containing a solvent and at least one solute that have the same properties throughout

Which is NOT true about compounds?

Identify #8

Small, positively charged particles that are found in the nucleus of an atom.

The two types of pure substances are

Unreactive elements, always found on their own in nature

The central core of an atom which contains protons and neutrons.

Proposed a model that was like “seeds in a watermelon”; discovered the electron

Discovered the nucleus using his gold foil experiment

A group of two or more atoms held together by chemical bonds.

A one or two letter representation for an element is a

A small particle in the nucleus of the atom, with no electrical charge.

A single kind of matter that has a specific chemical composition and definite properties.

Which is NOT true about homogeneous mixtures?

Identify #5

What are the smallest units of elements that still retain the properties of that element?