A. the structure of [no3]- is either trigonal planar or trigonal pyramidal draw both possible structures and determine the point group for each using drawing software. b. which irreducible representations represent the translational and rotational modes for each possible structure of [no3]-?

Explain why scientists use shared characteristics to make cladograms.

Which best describes how johannes kepler developed his laws of planetary motion

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