Which is the binary Ionic compound 1. MgCl2

2.C6H12O6

3. CO2

4. PO4 3-

5. CH4

Iknow the answer is a but i don't know why

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

How do scientists think that gravity affected the formation of our solar system?