The prefix kilo- means ____.

The prefix milli- means ____.

The correct symbol for the SI unit of temperature is ____.

The SI unit that is used to measure time is the ____.

The variable plotted on the horizontal or x-axis is called the ____.

How many meters are there in 1,865 cm?

In a graph showing temperature change of a material over time, temperature change is the ____.

The best type of graph to use to show how some fixed quantity is broken down into parts is ____.

One benefit of the SI system is that it is ____.

A beaker contains 0.32 L of water. What is the volume of this water in milliliters?

A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?

When designing an experiment, the first step is to ____.

A rule or principle that describes what happens in nature is a ____.

An explanation of an event that is based on repeated observations and experiments is a ____.

An idea, event, or object can be represented by a ____ to help people better understand it.

A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the ____.

A factor in an experiment that changes from the manipulation of the independent variable is the ____.

A factor that does NOT change in an experiment is the ____.

Studying the effect of one thing on another in order to test a hypothesis is a(n) ____.

A factor that is manipulated in an experiment to change the dependent variable is the ____.

Three examples of physical change are ____.

The shape of an apple is a ____.

Fog is an example of a ____.

When a log burns in a fire, ____.

When two or more substances are combined so each substance can be separated by physical means, the result is a(n)____.

A ____ is NOT a mixture.

The scattering of light by colloids is called ____.

Each inner energy level of an atom has a maximum number of ____ it can hold.

Dot diagrams are used to represent ____.

Particles of matter that make up protons and neutrons are ____.

A chemical symbol represents the ____ of an element.

Horizontal rows of the periodic table are called ____.

Atoms of the same element with different numbers of neutrons are called ____.

A particle that moves around the nucleus is a(n) ____.

Elements that are gases, are brittle, and are poor conductors at room temperature are ____.

A ____ is used to accelerate protons in the study of subatomic particles.

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is ____.

In a chemical formula, the number of each type of atom in the compound is shown by numbers called ____.

A group of covalently bonded atoms that acts together as one charged atom is a ____.

The elements that make up a compound and the exact number of atoms of each element in a unit of the compound can be shown in a ____.

A chemical bond that occurs when atoms share electrons is a(n) ____ bond.

The ____ tells you how many electrons an atom must gain, lose, or share to become stable.

The sum of the oxidation numbers in a neutral compound is always ____.

The oxidation number of an atom is shown with a ____.

Which of the following correctly shows the formula for a hydrate?

How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?

What kind of chemical bond is formed when an equal exchange of electrons occurs?

What is the total number of atoms in the compound Ca(ClO3)2?

What is the total number of atoms in the compound Ca(ClO3)2?

What is the name of the compound with the formula NaCl?

Why do the noble gases NOT form compounds readily?

What is the number of potassium atoms compared to oxygen atoms in a binary compound made from these two elements?

What is the name of a binary compound made up of lithium and chlorine?

Which of the following is the correct formula for magnesium nitrate?

What is the charge of phosphate in K3PO4?

What is the correct name for K2SO4?

What is the correct formula for magnesium oxide?

A(n) ____ chemical equation has the same number of atoms of each element on

Each substance on the left side of the arrow in a chemical equation is a ____.

Which of the following is a balanced chemical equation?

The energy required to break the original bonds is less than the energy release when new bonds form in a(n) ____ reaction.

If heat must be added to a chemical reaction for the reaction to take place, the reaction is ____.

What type of reaction is shown in the following chemical equation: NH3 + HCl → NH4Cl?

Which of the following could represent a decomposition reaction?

In a chemical equation, the symbol that means dissolved in water is ____.

When one element replaces another element in a compound, the reaction is a ____ reaction.

A substance that speeds up a chemical reaction without being permanently changed itself is a(n) ____.

The breaking down of a substance into two or more simpler substances is ____.

Each substance to the right of the arrow in a chemical equation is a(n) ____.

Substances that prevent, or slow down, chemical reactions are called ____.

A chemical reaction in which heat energy is released is ____.

Numbers that precede (are in front of) symbols and formulas in a chemical equation are ____.

According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?

What is an insoluble compound that forms during a chemical reaction?

A chemical reaction in which two or more substances combine to form another substance is called a ____.

According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?

What type of reaction is shown in the following chemical equation: 2H2O → 2H2 + O2?

The burning of wood in a campfire that produces heat and light would be both an ____ and an ____ reaction.

When most chemical reactions take place, some ____ in the reactants must be broken, a process that requires energy.

Substances are either elements or mixtures.

The color of a substance is a physical property.

Smoke is a compound.

Distillation is a way to separate a mixture using the physical property of boiling point.

The law of conservation of mass states that the mass of all substances before a physical change equals the mass of all the substances after the change.

Colloids are mixtures.

The freezing of water is a chemical change

Homogeneous mixtures include colloids, solutions, and suspensions.

When lightning converts oxygen gas, O2, into ozone, O3, it is a physical change.

A fruit salad is a homogeneous mixture.

Flammability is a physical property

When a firecracker explodes, mass is lost.

If a mixture scatters light and does not settle upon standing, it is a suspension.

A suspension is a homogeneous mixture.

The breaking of a glass window is a physical change.

Using oxygen to separate molten copper sulfide into copper and sulfur dioxide is a physical change.

The central core of an atom is called the hub.

The chart showing the classifications of elements according to their properties and increasing atomic numbers is called the periodic table.

The mass of an electron is about equal to the mass of a proton.

Elements arranged in vertical columns in the periodic table are called periods.

The region around the nucleus occupied by the electrons is called the negative zone.

The maximum number of electrons in the second energy level of an atom is 4.

The maximum number of electrons in the second energy level of an atom is 4.

Metals are good conductors of heat and electricity.

Scientists believe that naturally occurring elements are manufactured within Mars.

So far, scientists have confirmed the existence of six different quarks

In 1926, scientists developed the Bohr model of the atom that is in use today.

The sum of the number of protons and neutrons in an atom is the mass number.

The symbol for fluorine is Fe.

A very stable electron arrangement in the outer energy level is characteristic of noble gases.

One proton and one electron are added to each element as you go across the periodic table

Electron cloud models are used to show how electrons in the outer energy level are bonded when elements combine to form compounds.

The atomic number of an element is determined by its number of protons.

According to present atomic theory, the location of an electron in an atom cannot be pinpointed exactly.

Moving from left to right in a row of the periodic table, metallic properties increase.

The properties of a compound are the same as the properties of the elements making up the compound.

Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule.

Particles formed from the covalent bonding of atoms are called ions.

Molecules are neutral.

A term that means "without water" is anhydrous.

When an atom gains or loses electrons, the charged particle that results is called a molecule.

The formula SO42- stands for ammonium.

An atom is chemically unstable when its outer energy level contains all the electrons it can hold.

The chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atoms do. The hydrogen chloride molecule is therefore a nonpolar covalent molecule.

An element's oxidation number indicates how many electrons the element must gain, lose, or share to become stable.