Answer:
6.52 × 10^14 Hz
i don't know if that's right tbh
Answer:
Element; compound
Explanation:
Oxygen is an element on the periodic table, but when it's combined with the element Hydrogen, it produces water, which is a compound (H2O). When two elements combine, it produces a compound.
I hope this helps! :)
Answer:
i am sure its the last one