Atoms and reactions 1 Flashcards
What is an isotope?
An atom with the same number of protons and electrons but a different number of neutrons
What decides an atoms chemical properties?
The number and arrangment of electrons.
What does having a different number of neutrons affect?
The physical properties of an atom.
Who disputed the plum pudding model and how?
Ernest Rutherford with the gold foil experiment.
Who discovered the neutron?
James Chadwick
What is the definitiob of relative atomic mass?
The weighed mean mass of an atom of an element, compared to 1/12 of the mass of an atom of carbon-12
What is the definition of relative isotopic mass?
The mass of an atom of an isotope, copared with 1/12 of the mass of an atom of carbon-12
What is the definition of relative molecular mass (Mr)?
The average mass of a molecule or formula unit compared to 1/12 of the mass of an atom of carbon-12
What is a mass spectra?
Devices that are used to find out what samples are made up of by measuring masses of their components.
What is avogadros constant?
The number of particles in a mole: 6.02 * 10^23
What is the empirical formula?
The simplest whole number ratio of atoms of each element in a compound.
What is the formula and charge of a Nitrate ion?
NO3 charge is -
What is the formula and charge of a Carbonate ion?
CO3 charge is 2-
What is the formula and charge of a Sulfate ion?
SO4 charge is 2-
What is the formula and charge of a hydroxide ion?
OH charge is -
What is the formula and charge of a ammonium ion
NH4 charge is +
What is the formula and charge of a zinc ion
Zn charge is 2+
What is the formula and charge of a silver ion?
Ag charge is +
