Acompound contains 14.5 g of magnesium and 3.5 g of oxygen. what is the mass percent of oxygen in the compound

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)

What was bohr’s contribution to the planetary model