The smallest unit of matter that has the properties of an element is a(n) ___.

Atoms are so small, that if the atoms in a grapefruit were the size of blueberries, the grapefruit would be the size of ___.

Which subatomic particles are found in the nuclei of atoms?

How many valence electrons does this atom have?

What is the mass number of this element?

If this atom became an ion it would ___ electrons and have a ___ charge.

When two or more DIFFERENT OR SAME atoms bond together, they form a(n) ___.

A substance made up of DIFFERENT atoms bonded together is a(n) ___.

Matter is anything that has ___ and ___.

The state of matter that has a definite shape and a definite volume is a ___.

The state of matter that has an indefinite shape and a definite volume is a ___.

The state of matter that has an indefinite shape and an indefinite volume is a ___.

The state of matter that has an indefinite shape and an indefinite volume and is made of hot, ionized gas is a ___.

As matter changes from solid to liquid to gas, the kinetic energy of its particles ___.

As matter changes from gas to liquid to solid, the kinetic energy of its particles ___.

When matter changes from a solid to a gas, like when dry ice (solid CO_²)

smokes, it is called ___.

When matter changes from a gas to a solid, like when water vapor forms frost (ice crystals) on glass, it is called ___.

During a phase change, the temperature of a substance does not change (horizontal line) because the heat energy is ___ to break bonds or ___ to make bonds.

The "8" is the ___ number and tells us ___.

The "15.999" is the ___ number and tells us ___.

Most oxygen atoms have ___ neutrons in there nucleus.

Ionic bonds form between atoms to make compounds when ___.

Covalent bonds form between atoms when ___.

The study of substances and how they change is ___.

Atoms gain or lose valence electrons when they form bonds to get a(n) ___ outer electron shell because it makes them more stable.

On the periodic table, the rows are called ___ and the columns are called ___.

Elements in the same ___ have similar properties because they have ___.

Most elements on the periodic table are ___

Elements that are malleable, ductile and good conductors of heat and electricity are ___.

Elements that brittle (easy to break) , and poor conductors of heat and electricity are ___.

The most reactive metals on the periodic table are in group ___ and are called

___.

The most reactive nonmetals on the periodic table are in group ___ and are called

___.

The most nonreactive (inert) elements on the periodic table are in group ___ and are called

___.

This is an atom of the element ___.

This is an atom of the element ___.

Which of the following IS NOT a name used for elements they share properties of both metals and nonmetals?

The elements on the periodic table are arranged by

increasing ___.

The the atomic number is based on the number of ___ atoms have.

If an atom loses or gains protons, it becomes a(n) ___ , if it loses or gains electrons, it becomes a(n)___, and if it loses are gains neutrons, it becomes a(n) ___.

___ atoms tend to lose electrons in chemical reactions and get a (+) charge.

These are known as ___.

___ atoms tend to gain electrons in chemical reactions and get a (-) charge.

These are known as ___.

Atoms of the same element with DIFFERENT numbers of neutrons are called ___.

Name Na₂O.

Name CaCl₂.

Name Al₂S₃.

Name H₂O.

Name N₂O₄.

Name CCl₄.

In chemical reactions, elements are ___.

In chemical equations, the reactants (starting substances) are on the ___ and the products (ending substances) are on the ___.

Chemical equations are balanced so that they can tell you the amounts of reactants and products are involved tin a chemical reaction.

To do this, the number of reactant atoms must be ___ the number of product atoms.

The natural law of the conservation of mass is used to balance chemical equations. This law states that in chemical reactions___.

Which coefficient set will balance Mg (s) + HCl (aq) => MgCl₂ (aq) + H₂ (g) ?

Which coefficient set will balance H₂ (g) + O₂ (g) => H₂O (l)

Which coefficient set will balance Zn (s) + O₂ (g) => ZnO (s)

What type of reaction is Mg (s) + HCl (aq) => MgCl₂ (aq) + H₂ (g) ?

What type of reaction is Zn (s) + O₂ (g) => ZnO (s)?

A solution is a ___ mixture with the its components, the solvent and the solute ___ mixed together.

A material like concrete is a ___ mixture with its components, cement, sand, and gravel ___ mixed together.