Pre-AP Chemistry Midterm Flashcards

Terms Definitions
Plutonium
Pu
Nickle
Ni
Tin
Sn
Cobalt
Co
Chromium
Cr
Argon
Ar
Calcium
Ca
Pauli
Electron spin
Stoichiometry
conversin of units
Bohr
Introduced single quantum number
Wavelength
The distance between successive peaks
weak force
associated with radioactive decay
A compound contains 259.2gFe2 and 40.8gC. What is the empirical formula?
F2C
Classify the following substances as pure or mixtures:
a.) sugar
b.) air
c.) diamond
d.) gasoline
e.) nitrogen gas
a.)
b.)
c.)
d.)
e.)
neutron
an elementary particle with 0 charge and mass about equal to a proton
substance
that which has mass and occupies space
Law of Octaves
properties repeated every 8th element
evaporation
vaporation that occures at the surface of a liquid that is not boiling
Which of the following is an electrolyte?
a. sodium chloride b. sugar
c. pure water d. glass
a.
Democritus
Greek philosopher who thought that the atom was indivisible
noble gas
any of the chemically inert gaseous elements of the helium group in the periodic table group 18a
Electron Configuration
the arrangement of electrons in an atom.
Acid
give off the Hydrogen ions in water and have a pH of less than 7
amorphous solid
describes a solid that lacks an ardered internal structure; denotes a random arrangment of atoms.
Define absolute zero
The temperature -273.15 degrees C, given a value of zero in the Kelvin scale
Which of the following is a molecular compound that ionizes in water?
a. NaCl b. Cl2 c. HCl d. C6H6
c.
octet rule
States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons
Heat Capacity
the amount of heat required to raise the temperature of a specified amount of a substance by 1°C or 1 K.
Dalton's Law
states that the total pressure in a container is the sum of the partial pressure of all the gases int he container. PT=P1+P2+P3
gas pressure
results from the force exerted by a gas per unti surface area of an object; due to collisions of gas particles with the object
Which of the following is a molecular substance whose aqueous solution carries an electric current?
a. liquid hydrogen b. hydrogen chloride
c. sugar d. iron
hydrogen chloride
gravity
the effect on a single atom is still not fully understood
Law of Conservation of Energy
the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes
vapor presure
a measure of the force exerted by a gas above a liquid in a sealed container; a dynamic equilibrium exist between the vapor the vapor ant the liquid
How many moles of ions are produced by the dissociation of 1 mol of Al2(CO3)3?
5 mol
Noble Gas Notation
Use of noble Gas prior to element and then finish configuration.
An endothermic dissolution process
absorbs energy are heat and has a positive enthalpy of solution
What 3 #'s on the pH scale are acids, bases and neutral.
1-6(acids), 7(neutral), 8-14(bases)
Can you have a negative Kelvin value? Explain why or why not
You cannot have a negative Kelvin value because 0 Kelvin is absolute 0
What info is needed to determine the molecular formula of a compound?
Mass given and the mass of the element
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