Answer:
option B
Explanation:
<h3>The energy required to go from liquid to gas / water vapour</h3>
An element with an atomic number 12 has 12 protons.
atomic number=number of protons.
Answer:
correct formula: C2F4
Explanation:
tetra means 4. There are 2 C and 4 F in dicarbon tetrafluoride.
If its in the shape of a sphere its volume is 696.909703 or 697 cubic mm to the nearest cubed mm.
Answer:
The number of neutrons is obtain through the difference of the mass number and the number of electrons
Explanation:
By looking at the periodic table, you will see that Fluorine has 9 protons.
Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well.
Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.
As for the atomic number, it is obtainable through the periodic table itself.
