Foundations Flashcards
module two
what is an atom
basic building blocks
what is the atomic structure
nucleus in a centre which consists of neutrons and protons. electrons within shells orbit nucleus
relative mass and charge of proton
RM: 1
RC: +1
relative mass and charge of neutron
RM: 1
RC: 0
relative mass and charge of electron
RM: 1/2000
RC: -1
what is an isotope?
atoms of the same element that has the same number of protons but different number neutrons.
what letter presents the atomic number of an element
Z
what letter represents the mass number of an element
A
what does the group number of an element determine about an element
group number determines the outmost electrons
how to calculate relative atomic mass
(abundance 1(%) x mass no1)+(abundance 2(%) x mass no2)
rutherfords model
bohrs model
what is the formula for:
nitrate
carbonate
sulfate
hydroxide
ammonium
zinc
silver
NO3 –
CO3 2-
SO4 2–
OH –
NH4 +
Zn 2+
Ag +
what is a mole
amount of subastance
represents avagadros constant (6.02x10^23)
what is molar mass
mass per mole, units g mol–1
