Which of these have a double bond? Pick all that apply: SiCL2Br2
H2O
HBr
SeBr2
CO2

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers