Chapter 1- atoms ions and comps Flashcards
What is the atomic number?
The proton number
Isotope
Atoms of the same element with different numbers of neutrons and different masses
Difference between mass number and atomic number?
Mass number is the No. protons + no. e
Atomic number is the number of protons
Do isotopes react differently?explain why
The number of electrons had no effect on reactions of an element therefore diff. Isotopes of an element react in the same way- however there may be small differences in physical properties.
Define relative isotopic mass
The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12
Define relative atomic mass
The weighted mean mass of an atom of an element relative to 1/12th of the mass of an atom of carbon-12
What is used to determine the % abundance of the isotopes in a sample of an element
Mass spectrometer
Define a binary compound
A compound that contains 2 elements only
Define a poly atomic ion?
An ion that contains atoms of more than one element bonded together
What is the formula of ammonium?
NH4+
Formula of nitrate and nitrite?
NO3-
NO2-
Formula of hydrogencarbonate
HCO3-
Formula of manganate(VII)
Mn04-
Formula of sulfate and sulfite?
SO4 2-
SO3 2-
Formula of dichromate?
CR2O7 2-
