Which of the following best describes the difference between a mixture and a pure substance? A. A mixture has different properti
es throughout; a pure substance has the same properties throughout. B. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom. C. A mixture is made up of only one type of atom; a pure substance is made up of more than one type of atom. D. A mixture has the same properties throughout; a pure substance has the different properties throughout.
An alpha particle is a helium nucleus, 2 protons and 2 neutrons, loss of an alpha particle give a new element with an atomic number 2 less than the original isotope and an atomic mass that is lower by about 4 amu.
Solids - particles are very close together (highest density on the list) Liquids - the particles slide past one another Gases - particles bounce off of surroundings and the same particles of the gas
