Which activity is the best demonstration of J. J. Thomson’s use of creativity in his work? a) ignoring observations in his experiment

b) interpreting the results of his experiment

c) physically assembling the apparatus for his experiment

d) reading about Joseph Proust’s work

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

What does a numerical subscript following an element in a chemical formula mean?