Topic 1.1: Amount of substance Flashcards
What is the definition of Ar?
Ar is the mean mass of an element divided by 1/12 of the mean mass of a carbon 12 atom
What is the definition of Mr
Mr is the mean mass of a molecule divided by 1/12 of the mean mass of a carbon 12 atom
What is the formula for the number of particles?
number of particles = number of mol x Avogadro’s constant
what is the formula for sulfide and its charge?
Sulfide formula: S
Sulfide charge: 2,4 or 6
what is the formula for sulfite and its charge?
Sulfite formula: SO3
Sulfite charge: 2
what is the formula for sulfate and its charge?
Sulfate formula: SO4
Sulfate charge: 2
what is the formula for nitride and its charge?
Nitride formula: N
Nitride charge: 3
what is the formula for nitrite and its charge?
Nitrite formula: NO
Nitrite charge: 1
what is the formula for nitrate and its charge?
Nitrate formula: NO3
Nitrate charge: 1
what is the formula for carbonate and its charge?
Carbonate formula: CO3
Carbonate charge: 2
what is the formula for hydrogen carbonate and its charge?
Hydrogen carbonate formula: HCO3
Hydrogen carbonate charge: 1
what is the formula for hydroxide and its charge?
Hydroxide formula: OH
Hydroxide charge: 1
what is the formula for phosphate and its charge?
Phosphate formula: Po4
Phosphate charge: 3
what is the formula for silver and its charge?
Silver formula: Ag
Silver charge: 1
what is the formula for a transition metal and its charge?
Transition metal formula: On the periodic table
Transition metal charge: Look at the roman numeral
What is the empirical formula defined as?
The simplest whole number ratio of atoms in each element present in a compound
What is the molecular formula defined as?
The actual number of atoms in each element in a compound
Describe the plum pudding model
A sphere of positive charge with small negative charges distributed evenly within it
Describe the electron shell model
A dense central nucleus with protons and neutrons
electrons orbit the nucleus in shells
Describe electron orbitals
Clouds of an area of probability of where an electron could be found. Can be s, p, d, or f.
Which electron orbital fills up first? 3d or 4s
4s fills up first before 3d
