Is fluorine a element, compound or mixture

If Junes mother had 3 children July August who is the third child

Technician A says that objects with high permeability allow magnetic lines of flux to flow easily through their material.

In the fourth period of the periodic table, how many elements have one or more 4p electrons

For a chemical reaction, the activation energy for the forward reaction is + 215 kJ and the activation energy for the reverse reaction is + 59 kJ.

What are at least five things that you use that could harm the ozone layer?

Which of these is a property of bases? They produce hydrogen gas when reacted with metals. They turn litmus paper blue. They feel sticky. They taste sour.

After Pangaea broke up, North America became part of what?

What the different betwen observe and reference

How many moles are in 12.5 g of H2O

How do the atomic number and the number of protons relate to one another? The atomic number tells us the number of protons The atomic number is protons + neutrons They do not Electron Cloud