Answer: 10.99
Explanation: because you take the Cao 13.9 and take CO2 which is 10.99 and it makes 24.8 . Which is CaCO3.
Answer:
energy
Explanation:
it is required energy to remove an electron from an atom
Answer:
Helium
Explanation: The ionization energy decreases from the top to bottom in groups. And increases from left to the right across a period. Therefor Helium has tge largest first ionization energy, while francium has one of the lowest.
C. Groups 13-16 contain metalloids.
If you look on a periodic table, these usually have a different color.
