The average melting point for a solid is -38.83 degrees Celsius and -37.89 degrees Fahrenheit.<span />
2 F atoms
Explanation:
A Ca atom has a valence number of +2, which means that when ionized, it will give up two electrons. In turn, a F atom has a valence number of -1, which means it can only accept 1 electron when ionized. So to accommodate the two electrons from Ca atom, we need 2 F atoms.
Barium oxide is a white, hygroscopic non-flammable compound. It also takes on the form of a cubic structure and is used in cathode ray tubes, crown glass, and catalysts.
It's known to be very harmful to human skin and if swallowed in large quantities it causes irritation. Excessive quantities of barium oxide can and most likely will lead to death.
Answer:
All of the above are properties that rocks share
Explanation: