Unit 1
A gold bar is an example of this type of pure substance that cannot be broken down by chemical means.
Element
These atoms of the same element have the same number of protons but different numbers of neutrons.
Isotopes
This type of ion is formed when an atom loses electrons, resulting in a net positive charge.
Anion
How many atoms of carbon are there in 24 g?
1.2 * 10^24 atoms
In what year did the first manned moon landing take place?
1969
This prefix represents the factor 10^-12 in the metric system.
Pico
This constant, approximately 6.022 times 10^23, represents the number of particles in one mole.
Avagadros Number
What is the proper name for the chemical formula Fe2O3?
Iron (III) Oxide
Is rusting a physical or chemical change?
Chemical
What language has the most native speakers in the world?
Mandarin
In the measurement 0.004050 L, there are this many significant figures.
4
According to the Planck-Einstein relation, energy is directly proportional to this property of a wave.
Frequency
In this type of bond, electrons are shared unequally between two atoms due to differences in electronegativity.
Polar Covalent Bond
A laboratory experiment requires 2.50 liters of a solution. Using dimensional analysis, find the equivalent volume expressed in cubic inches 1 inch = 2.54 cm and 1 L = 1000 cm^3
153 inches cubed
What is the only country in the world to have a flag that is neither square nor rectangular?
To convert Celsius to Kelvin, you must add this numerical value to the Celsius temperature.
273.15
This quantum number, symbolized by L, determines the shape of an atomic orbital.
Angular momentum quantum number
This vector quantity measures the net separation of positive and negative charges in a molecule.
Dipole Moment
This principle states that it is impossible to simultaneously know both the exact position and the exact momentum of a particle.
Heisenberg Uncertainty Principle
What is the name of the ancient city built into the cliffs of Jordan?
Petra
This term describes how close a series of measurements are to one another, regardless of the true value.
Precision
This periodic trend describes the energy required to remove an electron from a gaseous atom.
Ionization Energy
A molecule with three bonding pairs and one lone pair on the central atom has this molecular geometry.
This rule states that electrons will occupy empty orbitals of the same energy before pairing up.
Hund's rule
Who was the first nobel laureate in chemistry?
Marie Curie