Intro to Chemistry Semester Test Review

If element Q has 15 protons, its atomic number is.

Computers are an example of ______ that helps people solve problems.

The three values- 11.512 m, 12.983 m, and 13.764 m- have the same number of ______.

Which of the following is NOT a clue that a chemical change has taken place?

The SI base unit of mass is the ____.

According to Charles' Law, the temperature that is called absolute zero is.

During a(an) ______ change, the system releases energy to its surroundings.

What are two atoms of the same element that have different mass numbers called?

When a metal changes color because it has been heated, a(an) _____ change occured.

An organized plan for gathering, organizing, and communicating information is called a(an) _____.

When Mendeleev organized elements in order of increasing mass, elements with similar properties were in the same ____.

A measurement must include both a number and a(an) _____.

Measuring how quickly a reactant disappears is one way to measure the _____ of the reaction.

At sea level, water boils at _______ degrees Celsius.

The results of Rutherford's gold foil experiment showed that the _ occupies a very small amount of the space in an atom.

Which of the following is NOT a pure substance?

A _____ makes it easier to understand things that are too small, too large, or too hard to observe directly.

A(An) ________ is a statement that summarizes a pattern found in nature.

The compound whose formula is SO3 is called

Another name for the elements in Group 1A is the ____.

The molar mass of a diatomic molecule of oxygen is what?

The phase change that is the opposite of vaporization is.

A _____ is a way of organizing data that is used to show changes that occur in related variables

How many grams of Na are in 4.0 mol of the element?

If an atom has 34 protons and 36 neutrons, the mass number is.

In ionic compounds, the sum of the charges of all the cations and anions must be _____.

In an experiment, 0.016 seconds equals ______ milliseconds?

Every element wants to _____.

Another name for the elements in Group 7A is the ____.

An ion with a positive charge is called a(an) _____.

A ______ has a definit volume and no definite shape.

On the periodic table, there are two numbers for Krypton, Kr:36 and 83.80. What do each of these numbers represent?

A _____ has a definite volume and a definite shape.

A material's ability to burn in the presence of oxygen is _______.

If an atom has a mass number of 31 and 16 neutrons in its nucleus, what is the atomic number of the element?

What kind of change is taking place if you see white mold growing in a strawberry?

The ions in solid sodium chloride are arranged in a structure called a(an) _____.

If a spoon gets hot quickly when it is used to stir a pot of soup, it is probably made of _____.

In what conditions does plasma exist?

The _____ is the region in which an electron is most likely to be found.

The elements organization in the periodic table can best be described by the order ______.

What is always present in a combustion reaction?

A sample of H2O contains 112 g of the compound. How many moles of H2O is contained in the sample?

In what conditions does Bose-Einstein condensate exist?

In scientific notation, (7.9 x 10^4) x (3.6 x 10^2) equals _____.

According to ______, all matter was made up of four elements: earth, air, fire, and water.

Which of the following is a heterogeneous mixture?

The phase change that is opposite of sublimation is?

The elements are arranged in the periodic table by their _____.

A solid that forms and separates from a liquid mixture is a(an) ______.

In the group name (1A, 2A, 3A, etc...) the coefficient equals what?

If energy is released in a chemical reaction, the reaction is ______.

The phase that is opposite of freezing is.

What subatomic particle did J.J. Thomson discover?

_____ is the closeness of a measurement to the actual value being measured.

______ are found in the nucleus.

The atomic mass unit (amu) is defined as one-twelfth the mass of a(an) ______-12 atom.

A _____ has no definite volume and no definite shape.

A(An) ________ explains a pattern found in nature.

An ion with a negative charge is called a(an) ___.

Another name for the elements in Group 2A is the _____.

In an electron dot diagram, each dot represents a(an) ______.

Another name for the elements in Group 8A is the ____.

The elements in which group are the most reactive?

If there are two long dashes between two atoms in a structual formula, molecules of the compound contain a(an) ___ bond.

When a metal changes color because it has reacted with another substance, a(an) ______ change occured.

If energy is absorbed in order to start a chemical reaction, the reaction is _____.