I have a lab report I have to do for Chemistry on Edge, the lab is on Enthalpy. please let me know if you need further information.

What elements have 2 electrons inthe 4s sublevel

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

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