Idon’t understand this at all, if someone could me

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Name the intersection of plane bpq and plane cpq.