This is how fluorine appears in the periodic table.

A green box has F at the center and 9 above. Below it says fluorine and below that 19.00. A blue arrow points to 9.

What information does "9” give about an atom of fluorine? Select three options.

the atomic number
the atomic mass
the number of protons
the number of electrons
the number of neutrons

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added

Which of the following is true about the speed of light? it depends on the wavelength.