Chemistry and Electricity Exam Review

Vocabulary flashcards for Chemistry and Electricity Exam Review

Matter

Anything that has a mass and occupies space.

Homogeneous

Means having only one phase, or uniform.

Heterogeneous

Having many phases, or non-uniform.

Chemical Change

The change where a new substance is formed.

Alloy

A solid solution made up of 2 or more metals.

Density

Mass per unit volume.

Ion

What an atom becomes after it loses or gains electrons.

Atom

The smallest part of an element.

Molecule

The smallest part of a compound

Element

Pure substance containing identical atoms

Compound

Pure substance containing identical molecules

Ionic compound

The type of compound formed by a metal and non-metal.

Halogens

The elements in Group 17.

Alkali Metals

The name for the Group 1 elements.

Valence Electrons

The electrons on the outer energy level of an atom.

Group

A vertical column on the periodic table.

Period

A horizontal row on the periodic table.

Particle Theory of Matter

Theory that states that all matter is composed of particles which are in constant motion.

Quantitative Observations

Observations which use numbers.

Qualitative Observations

Observations which use descriptions/words.

Metals

Elements which have luster, are ductile and conduct heat and electricity.

Non-metals

Elements which do not have luster, are not ductile and are not good conductors of heat and electricity.

Attract

Unlike charges doing this.

Repel

How like charges behave.

Voltmeter

Device that measures potential difference.

Ammeter

Device that measures current.

Source

Part of an electric circuit that provides electrical energy.

Load

Part of an electric circuit that changes electrical energy into other forms of energy.

Current electricity

A continuous flow of electrons

Static electricity

The type of electricity where there is a build up of electrons on the surface of a material.

Insulator

The property of a material that prevents motion of electrons.

Electron

The subatomic particle with the least amount of mass.

Voltage

The amount of energy per unit charge.

Circuit

A closed path followed by electrons.