Nature of Science
What is Pseudoscience?
Science that is not backed up by evidence
Ex: Astrology
A negatively charged subatomic particle that has a mass of almost 0 atomic mass unit
Electron
What is a cation?
When an atom losses a negative charged particle making it a positive ion particle.
Condensation is when ______
Gas turns to water
How much is added when converting from Celsius to Kelvin?
273
A description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. They are always accepted to be true and universal.
A scientific law
An atom that has an overall charge because it does not contain the same number of protons and electrons
An ion
On the periodic table, what group do the halogens belong on?
Group 7
What has a larger wavelength, red or purple?
Red
Which law states that a given mass of a gas at a constant temperature, the volume of the gas varies inversely (indirectly) with pressure?
Boyle's law
What is the 2nd step of the scientific method?
Forming a hypothesis
Made up of different particles that are not uniformly distributed
Heterogenous mixture
Atoms of the same element that contain different numbers of neutrons
Isotopes
Where is the substance if all three states are in equilibrium?
The triple point
What is Avogadro's number?
6.02 x 10^23
Descriptive characteristics that cannot be measured
Qualitative data
A property of a substance that can be observed or measured without changing the chemical identity of the substance.
Physical Properties
What is it called when 2 atoms share 3 pairs of electrons
A triple bond
What type of waves have the highest energy and the longest waves?
Highest=Gamma rays
Longest=Radio waves
Name 3 units used to find the pressure
atmosphere (atm), millimeters of mercury (mmHg), kilopascals (kPa), and torr (T), Pascal (Pa)
Scientific notation has a range of ______ multiplied by a factor of 10
1 to 10 but not including 10
Dependent upon the amount of the substance present.
Extensive property
This is an example of _______
AX + B → A + BX
single-replacement reaction
When atomic nuclei split, this process is called ______
nuclear fission
What is the formula for the Ideal Gas Law
PV = nRT