The positively charged particles within an atom are called ____________.

What determines the atomic number of an element?

What are the negatively charged particles of an atom called?

What particle in the nucleus of an atom has no charge?

The mass of an atom comes from which particles?

What is a substance that cannot be broken down into simpler substances by chemical means?

An element is composed of atoms that have the same number of ______________ in their nucleus.

Neutral atoms have the same number of protons as they do __________________.

What element's neutral atom has 17 electrons?

How many neutrons are in a lithium atom?

The biggest group of elements on the periodic table are known as _____________.

What type of elements are good conductors of electricity?

What group of elements on the periodic table share properties of both metals and nonmetals?

What does it mean if an element can be hammered?

What does it mean if an element is shiny and reflective?

What does it mean if an element can be drawn out into wire?

What does it mean if an element combines easily with other elements?

What type of elements are considered semiconductors?

What type of elements are brittle, not malleable, and not ductile?

Iron is a good conductor of heat and electricity. What type of element is it?

Which of the following is least likely to conduct heat and electricity?

What is the atomic mass of aluminum?

How many electrons does aluminum have?

How many neutrons does aluminum have?

What are the basic building blocks of matter that are uniform and cannot be further broken down into simpler substances by chemical or physical means?

___________ are composed of two or more different elements joined together chemically.

True or False?

Each compound has its own unique composition of type and number of elements and atoms.

____________ are the combination of two or more atoms that are joined together chemically.

Molecules can be either ______________ or ____________.

When substances interact and form new substances, the properties of the new substances may be very different from those of the original substances, but the amount of ____________ does not change.

Physically combining two or more substances forms a _______________. These substances can be separated by physical processes.

Elemental hydrogen is written as H_2. What does this mean?

A water molecule is written as H₂O. What does this mean?

True/False

All particles of a pure substance have nearly identical mass.

True/False

Particles of different substances usually have the same mass.

For any change in a closed system, the number and type of atoms _____________.

____________ is always conserved in a closed system, but this is not always the case for ____________.

What is meant by the term viscosity?

What is meant by the term solubility?

What is known as mass per unit volume?

Changes that cause color change are:

Changes that cause a phase change are:

Changes that can be easily reversed are:

When no new products are formed, this results in a:

Changes that are not easily reversible are:

The formation of light, heat, sound, bubbles, or a precipitate result in a:

Wood burning is an example of a:

Slicing an orange is an example of a:

The process in which substances change into new substances with different properties is known as a:

Which of the following is an example of a chemical reaction?

What are substances that start a chemical reaction?

What are substances that are produced in a chemical reaction?

True/False

Chemical reactions occur when two or more atoms or molecules interact and change.

True/False

In a chemical reaction, bonds between atoms are broken, and new bonds are created to form new molecules.

Matter cannot be created or destroyed, but it can change form is known as:

Milk is an example of a:

Orange juice with pulp is an example of a:

Salt water is an example of a: