Honors Chemistry - Midterm

Study of the composition of matter.

Study of chemical changes in living things.

Chemistry of things containing carbon.

Anything that occupies space and has mass.

Object with a definite volume and shape (close attractive force)

Substance with a definite volume but takes that shape of its container.

Substance with NO definite volume or shape.

If a mixture is not uniform throughout, it is called…

Properties that depend on the type of material present (boiling point, melting point, density, etc.)

Properties that depend on the amount of mater present (volume, mass, length, etc.)

Observations dealing with the quality of a substance (the shoes are old and brown)

Observations dealing with the quantity of data (John Bapt has 2 Ms. Ortiz)

SI unit for mass.

SI unit for length

Measurements that fall in the same range/area.

Measurements falling close to the actual/true value.

Number of significant figures in the measurement 0.0004080 kg.

The Gold Foil experiment proved the existence of what?

Who discovered the electron?

Cathode Ray Tubes led to the discovery of the…

Atoms of the same element with different numbers of neutrons.

Who is credited with the photoelectric effect?

Number of s orbitals?

Number of p orbitals?

Number of d orbitals?

Number of f orbitals?

All electromagnetic radiation has the same what?

For an electron in an atom to change from an excited state to a ground state, energy must be…..

Which two elements have different electron notations than expected?

The energy required to remove an electron is known as what?

As we go down a group, the atomic radius….

Which type of bond is the strongest, single, double, or triple?

Which have higher melting points, ionic or covalent (molecular) compounds?

What is the molecular geometry of CH4?

To make a bond, must energy be added or removed?

What is the oxidation number of Fluorine?

What is the formula for dinitrogen pentafluoride?

In a polyatomic ion, the sum of the oxidation numbers is equal to the…

Name AlF3

Name CuCl2

Name OF2

Name NO2^-

What is the density of 39.56 g of material whose volume is 5.98 cm^3?

The number of atoms in 1 mol of Silicon is?

The mass of 1 mol of Carbon is?

The electron notation for Si is…

Poor conductors of heat and electricity; extremely brittle

Elements and compounds are ….. substances?

The smallest unit of matter that maintains its chemical identity.

Any substance that has a definite composition

A blend of any two or more kinds of matter, as long as each maintains its own unique properties.

The vertical columns on the Periodic Table

The horizontal columns on the Periodic Table

Formed when two liquids are mixed to form a solid.

Boiling point of water

Freezing point of water

The gravitational pull on a substance/object.

A statement that can be tested experimentally.

I mL is equal to…

Generalization that explains known facts that everyone agrees on.

The density of aluminum is 2.70 g/cm^3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm^3?

The density of pure diamond is 3.5 g/cm^3. What is the volume of a diamond with a mass of 0.25 g?

What is the density of 37.72 g of material whose volume is 6.80 cm^3?

1.06 L of water is equivalent to how many mL?

0.035550 g rounded off to two significant figures would be…

When 5.7m is divided by 2s, the quotient is correctly reported as…

What is 1.245 633 501 x 10^8 rounded to four significant figures?

When 1.92 x 10^-6 is divided by 6.8 x 10^2 mL, the quotient equals…

The result of dividing 10^7 by 10^-3 is…

The capacity of a Florence flask is 250 mL. Its capacity in L expressed in scientific notation is….

How do you calculate percent error?

Convert 4.2 x 10^8 cm^3 to m^3

The periodic table is a …. scale.

Avogadro’s number

Who proposed the Atomic Theory?

Number of isotopes in hydrogen.

Size of an electron.

Conducted the Gold Foil Experiment.

Mass number of an element.

Discovered the atom.

Reactants = Products Law

Law stating that formulas are ALWAYS written in small whole number ratios.

The most common form of Hydrogen has how many neutrons?

Carbon-14 (atomic number 6), has how many neutrons?

To determine the molar mass of an element, one must know the element’s…

A prospector finds 39.39 g of pure gold (atomic mass 196.9665 amu). She has how many atoms of Au?…

Determine the number of moles in 100. g of potassium. The molar mass of potassium is 39.10 g/mol.

Calculate the number of atoms in 10.0 g of sulfur (molar mass of 32.07 g/mol)

Waves that are small, have high frequency, and have high energy. (Often used in tanning booths)

He determined that electrons move around the nucleus in orbitals.

Electrons in the same orbital must have opposite spins.

Orbitals must have one electron each before a second can be added to any of them.

Waves that are long, have high frequency, and emit little energy (used in broadcasting)

Theory stating that an atom has orbitals that only predict the probability of the location of the electron.

The p orbitals are shaped like…

How many orientations can an s orbital have around the nucleus?

Noble Gas notation for copper

If the wavelength ( λ ) of green light is 4.44 x 10^-7 m, what is the frequency ( v )?

How much energy is released when an electron with a wavelength of 2.37 x 10^-7 m is excited?

E = hv (h= planck’s constant)

Created a model showing that electrons orbit the nucleus in electron orbitals.