How many match sticks will there be in the 4th picture?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

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

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false