You should have a thorough understanding of chemistry because:

Chemistry is the science that deals with the __ and how matter changes under different conditions

Matter:

All matter has physical and chemical properties and exists in the form of a:

Since matter is made from chemicals, everything made out of matter is a chemical

Matter has physical properties that we can:

Everything you can touch and everything you can see, with the exception of __ is matter

All matter is made up of:

You can see visible light and light created by electrical sparks, therefore these are made of matter

Light and electricity are forms of __, not matter

Everything known to exist in the universe is made of either __. There is no exception to this rule

Energy:

An element is the simplest form of chemical matter and contains only one type of __

__ cannot be broken down into a simpler substance without a loss of identity:

There are __ elements known to science today

There are ___ naturally-occurring elements known to science today on earth

There are __ synthetic elements produced artificially or through synthesis

All matter in the known universe is made up of elements that have their own distinct physical and chemical properties

Symbols for all the elements can be found on the periodic table of elements. Included are the:

The use of the word “chemical” to describe something does not mean it is dangerous or harmful

The word organic simply means that a substance contains the element:

Although the term is often used to mean “safe or natural” because of its association with living things, not all organic substances are:

Atmospheric oxygen is considered an __, a molecule containing 2 or more atoms of the same element in definite (fixed) proportions

The nucleus of atoms consists of PROTONS (subatomic particles with a __ charge) and NEUTRONS (subatomic particles with __ charge)

The number of __ in an atom determines the element

Atoms __ be divided into simpler substances by ordinary chemical means

The atomic structure of __, contains 6 protons and 6 neutrons at the nucleus and 6 electrons in the orbit

Just as words are made by combining letters, __ are made by combining atoms

A molecule is a chemical combination of two or more __ in definite (fixed) proportions:

Water is made from:

Carbon dioxide is made from:

Atmospheric oxygen and other chemical substances, such as ___, make up the air you breathe

Ozone is a __ made up of oxygen

O2:

O3:

Ozone is a major component of smog and can be very dangerous. It contains __ atoms of the element oxygen

Chemical combinations of two or more atoms of different elements in definite (fixed) proportions:

Sodium chloride, common table salt, is an example:

Each sodium chloride molecule contains one atom of the element sodium and one atom of the element chlorine

A change in the form of a substance without the creation of a new substance:

No chemical reactions are involved and no new chemicals are formed:

Solid ice melting into water, and then converting into steam when heat is applied:

When nail polish is applied onto nails and the solvent evaporates, forming a layer or film on the nail:

A change in the chemical composition or makeup of a substance:

The change is caused by reactions that create new substances, usually by combining or subtracting certain elements:

The creation of water through acid-alkaline neutralization is a:

Characteristics that can be determined without a reaction and don’t involve a change in the substance:

Physical properties include:

Physical properties include:

Characteristics that can be determined only by a reaction and involve a change in the substance:

Examples of chemical properties include the ability of:

A chemical combination of matter in fixed proportions:

Water and salt are examples of a __, with atoms in set proportions:

Most substances exist in a pure state

Air contains ___, this an example of a physical mixture

A physical combination of matter in any proportion:

Salt water is an example of a:

Most of the products that beauty professionals use are a:

Pure distilled water, ammonia, salt, and aspirin: