atomic structure Flashcards
key facts memory
define a compound
compounds contain two or more elements chemically combined
what does the atomic number of an atom represent?
the number of protons
how did Neil Bohr adapt the model of the atom
He suggested that electrons orbit at specific places
describe the plum pudding model of the atom
the plum pudding model of the atom is a ball of positive charges with negative electrons embedded in it.
define a mixture
mixture consists of two or more elements or compounds not chemically combines
state the approximate
radius of an atom
10x10^-10 metres
what does the mass number of an atom represent
the number of protons and neutrons
state the conclusions of the alpha scattering experiment
most of the atom is empty space and there is a positive nucleus in the centre
describe the current model of the atom
a positively charged nucleus composed of both protons and neutrons surrounded by negatively charged electrons
state the conclusions of the alpha scattering experiment
most of the atom is empty space and there is a positive nucleus in the centre
state the electrical charges of each subatomic particle
proton - +1
neutron 0
electron -1
state the relative mass of each subatomic particle
proton 1
neutron 1
electron very small
