Answer:
A
Explanation:
the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.
A critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction.
Answer:
sulfur
Explanation:
sulfur because it have unknown metal
i just got done with the unit 2 weeks ago
It's 1 because there is only one electron on the outer shell.
