Explain why some metals are found to occur freely in nature while other occur only as compound with example of each types of metals

Which of the following electromagnetic waves can create ions?

Will mark brainliest how many electrons can be held in the energy level n = 4?

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m