Chemistry Fall 2019 Final Review

The Pauli exclusion principle states that two electrons of opposite spins share one single atomic orbital.

Which is NOT a part of the scientific method?

Which type of data is based on measurements?

Why must a measurement include both a number and a unit?

Round 4.78 cm + 11.22 cm + 100.001 to three significant figures.

Write 3.402 x 10^3 in ordinary notation.

What are the two parts to writing a number in scientific notation?

A 5-mL sample of water has a mass of 5 g. What is the density of water?

Mass is an example of extensive property.

What is a combination of two or more elements chemically combined?

Chemistry is the study of matter and the changes it undergoes.

Amplitude is the wave's height from the origin to a crest, or from the origin to a trough.

A frying egg is undergoing a chemical change.

When converting from a small unit to a large unit, the number of units increases.

Write 0.0045834 mm in scientific notation.

Hund's rule requires single electrons to occupy each energy orbital before joining up with another electron.

Hydrogen's electron configuration notation is _________?

Length is an example of intensive property.

A defined unit based on a measurement.

It is the sum of the number of protons and neutrons in the nucleus.

Which type of data deals with observations?

The three states of matter are _________, __________, and __________.

An elements atomic number is equal its number of protons.

Density is an example of extensive property.

Physicist Max Planck's work was used by Niels Bohr to prove what?

Amount of matter plus gravity.

Using a cathode ray led to the discovery of which subatomic particle?

Which elements make up NaCl?

A measure of the amount of matter.

Wavelength is the shortest distance between equivalent points on a continuous wave.

Water freezing into ice is a chemical change.

Divide 4.8 x 10^5 km and 2.4 x 10^-3 km

How are temperatures on the Celsius and Kelvin scales related?

A burning piece of wood is undergoing a physical change.

Convert 45.3 mm to meters

Round 2,431,801 to five significant figures.

Add 7.21 x 10^3 mg and 43.8 x 10^2 mg.

Melting point is an example of intensive property.

Which chemist first discovered the existence of the atom?

Which chemist created the first widely accepted Periodic Table of the Elements?

Frequency is the number of waves that pass a point per minute.

A valence electron is _____________.

Which law states regardless of the amount, a compound is always composed of the same elements in the same proportions.

Round 0.0007810453 to four significant figures.

When dividing a number in scientific notation what happens to the exponents?

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Which of Ernest Rutherford's proteges discovered the nuclear atomic model?

A combination of base units.

Moving the decimal to the left in a number will subtract from the exponent in scientific notation.

Ernest Rutherford discovered what part of the atom?