Module 2, Section 1 Flashcards
What is the relative mass and charge of a proton, neutron, and electron?
Proton: Mass=1, Charge=+1
Neutron: Mass=1, Charge=0
Electron: Mass=0.0005 Charge=-1
What does the mass number tell you?
The total number of protons and neutrons
What does the atomic number tell you?
Total number of protons(electrons in neutral atoms)
What are the differences present in isotopes?
Numbers of neutrons and masses
KEY DEFINITION: Relative atomic mass
Weighted mean mass of an atom of an element compared with 1/12th the mass of an atom of carbon-12.
number of moles =
mass of substance/molar mass
number of moles (volume at RTP)=
volume(dm^3)/24
ideal gas equation=
pV=nRT
cm^3 to m^3
dm^3 to m^3
1x10^-6m^3
1x10^-3m^3
tonne to grams
1x10^6g
number of moles(titrations) =
concentration x volume (dm^3)
percentage yield =
actual yield /theoretical yield x 100%
atom economy =
molar mass of desired products/molar mass of all products x 100%
KEY DEFINITIONS:
Acids
Bases
Acids - proton donors, release H+ ions
Bases - proton acceptors, release OH- ions
Metal + Acid =
Metal Salt + Hydrogen
