Pre-AP Chemistry Semester I Final Review

A mixture can only have two components.

The Bohr model of the atom explains the emission lines of Fe.

The visible spectrum of light spans the range of approximately

A photon with the energy of 4.51 x 10^-19 would radiate light with a frequency closest to:

In order to convert between mass and number of particles, a conversion to __ is first required.

Calculate the number of atoms in 1.50 moles of Fe

One of the following is not a physical property of iron

A scientific law

Filtration separates

Metallic sodium can become a vapor.

The molecule CH₂CHCH₃CH₂CHF(CH₃)₂CCH₃ contains __ H atoms.

All samples of pure water contain the same ratio of H to O.

A pure substance has the following characteristic:

Which of the following is an element?

A low-frequency wave has a _____ wavelength

The wavelengths of infrared light are longer than those of visible light.

_____ charges attract one another.

Blood is a heterogeneous mixture.

Molar mass is defined as the mass of:

Which contains the greatest number of molecules?

Each electron can be described by __ quantum numbers.

The number of valence electrons in this atom is:

A theory has been:

Which of the following is not a physical change that a lead bar could undergo?

Atoms are electrically neutral.

You have a sample of cobalt chloride with the following properties. Which one is extensive?

Dalton believed that atoms could be:

How many oxygen atoms are in 3 moles of nitric acid (HNO₃)?

The volume of a sample of water does not change when heated.

A gas sample will not demonstrate one of the following properties

The amplitude of a wave is its

Potassium iodide (KI) is a physical mixture of potassium and iodine.

The emission spectrum for He contains _____ lines than the H spectrum

Green light has a λ = 545 nm (5.45 x 10^-7m). What is the frequency of this light?

Mass cannot be ______ or ______ during a chemical reaction.

Which of the following energy changes is associated with a chemical reaction?

One chemical property of the element sodium is

One of the following is not a representative particle:

The ability of aluminum to be formed into sheets is called:

A chemical symbol is

One element can be converted to another element using chemical processes.

Burning of gasoline is not a physical change.

A chemical formula

The dependent variable:

The photoelectric effect was first demonstrated by

An electron cloud

Which of the following is an element?

Chemical reactions can change the identity of atoms.

A neutron has a charge of:

Another term for a homogeneous mixture is a

The electron configuration for Mg is

The units of frequency are

An element has an atomic number of 25. That element is:

The molecule CH₂CHCH₃CH₂CHF(CH₃)₂CCH₃ contains __ H atoms

A representative particle of silicon dioxide is:

A chemical symbol is

Electromagnetic radiation exhibits wavelike behavior.

An electron and a photon are of equal mass.

Baking soda produces _____ during cooking.

In order to accept the results of an experiment:

Cathode rays were deflected _____ a negatively charged plate and ____ one with positive charge.

H₂SO₄ is a(n)

The photoelectric effect shows that light

Heisenberg Uncertainty Principle: velocity and position of ____ can not be measured accurately?

Mass ratio must be a whole-number ratio.

Energy levels of electrons in an atom are

Percent composition tells us:

Electrons move to lower energy levels as they emit energy.

Carbon and oxygen can only combine to form one compound.

Which one of the following is a material that was not developed by chemists?

Experiments are important because they:

The molar mass of CuCl₂ is:

Sodium chloride is changed to metallic sodium and chlorine gas. This process represents a:

Distillation is a process of separating materials by:

One of the following statements is not true of a physical change:

The law of conservation of mass says that the mass of products in a reaction:

Copper occurs naturally as Cu-63 and Cu-65. Which isotope is more abundant?

Electrical charges are carried by particles of matter.

A cathode ray tube emits

Physical changes involving a change of state are reversible.

The process of breaking a compound down into its elements is called

An increase in the quantum number n means ___ in the distance of the electron from the nucleus.

The compound NiS is composed of nickel and sodium.

A hydrate can be converted to its anhydrous form by:

Chicken noodle soup is a __________ mixture.

The mass of reactants must equal the mass of products.

A representative particle of silicon dioxide is

Two of the hydrogen emission lines are in the infrared region.

Cooking oil is a homogeneous mixture.

What element has an electron configuration of 1s²2s²2p⁶3s²3p⁶4s¹3d⁵?

There is often overlap between the disciplines of biochemistry and:

The process of breaking a compound down into its elements is called

Two isotopes of an element differ in the number of:

In the "plum pudding" model of the atom, electrons were:

Air can be considered a pure substance.

Rutherford's atomic model became known as the ______ model.

Our idea of the atom:

Which of the following is a physical change?

Chemical reactions change the __________ of atoms.

Improved rubber compounds for tires might be developed by: