The scientist credited with the discovery of the electron is

The scientist who discovered the existence of a closely packed positive region of the atom that is now known at the nucleus is

The famous "gold foil" experiment was performed by

What kind of charge does the center of an atom have?

Which particles are found in the nucleus of an atom?

Which two subatomic particles have about the same mass?

The atomic number of an atom is the same as its number of

If two atoms have different numbers of protons, what do you know about the atoms?

In a neutral atom, the number of protons is equal to the

How many protons does an atom of oxygen have?

How many electrons can be in the first energy level of an atom at one time?

How many electrons, protons and neutrons are found in a neutral atom of fluorine?

A material that is made of two or more substances that can be separated by a physical process is called

A characteristic of a material that can be observed without changing what the material is can be called a

The density of copper is an example of

Which of the following is the correct formula for potassium chloride?

Which of the following is the correct name of NaNO³?

Which of the following is the correct formula for calcium sulfide?

Which of the following is the correct formula for aluminum chloride?

How many neutrons are in the nucleus of an atom of aluminum?

How many electrons are in the outer energy level of all noble gasses except helium?

Which of the following elements is in the same family as chlorine?

Which of the following is a metal?

The type of bond that usually forms between two nonmetals is

Which element is the most chemically active nonmetal?

Which nonmetal is a liquid at room temperature?

The type of bond that usually forms between a metal and a nonmetal is

The elements in Groups 3-12 of the periodic table are the

A family of elements that has two electrons in its outer energy level is the

One element replaces another in a compound.

A substance breaks down into two or more simpler substances.

A precipitate, water or a gas forms when two ionic compounds are dissolved in a solution.

Two or more substances combine to form another substance.

C2H22O11 $$\rightarrow$$ 12C + 11H₂O

Zn + 2HCl $$\rightarrow$$ ZnCl + 2H

NiCl₂ $$\rightarrow$$ Ni + Cl₂

BaCl₂ + 2KIO3 $$\rightarrow$$ Ba(IO3)2 + 2KCl

4C + 6H₂ + O₂ $$\rightarrow$$ 2C₂H₂O

Each substance on the right side of the arrow in a chemical equation is a

The formation of a precipitate when two solutions are mixed is an example of

What is an insoluble solid that forms as the result of a chemical reaction?

Three indications that a chemical reaction has occurred are

In all chemical reactions, energy is

A substance that speeds up a chemical reaction but does not get changed by the reaction is a/an

Substances that speed up chemical reactions in living things and make life reactions take place at faster speeds and lower temperatures are called

The hydronium ion has the formula

A substance has a slippery feel and conducts electricity. The substance is probably

The reaction of an acid and a base is called

What is the difference between a strong acid and a weak acid?

A solution with a pH of 7 is

A solution with a pH of 9 is

A solution with a pH of 5 is

A solution with a pH of 3 will turn litmus paper

A solution with a pH of 11 will turn litmus paper

When an acid is reacted with a base, the products are

Which of the following describes the motion of particles in a solid?

What is the oxidation number of all the elements in group 15?

Which state of matter is represented in the image?

Which state of matter is represented in this image?