Granite lasts a long time when it is used for building in areas where A. repeated freezing and thawing is common.
B. the climate is mostly cool and dry.
O C. acid rain is common.
D. the climate is hot and rainy.
Help me please this is a test please

Which is a character of nuclear fusion but not nuclear fission

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

How is the atomic number of a nucleus changed by alpha decay