Write the isotope notation for an atom that has 7 protons and 9 neutrons.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

The energy that powers a hurricane is derived from

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive