Approximately how many elements are there that combine chemically in a great number of ways to produce compounds? a. 25 b. 50 c .75 d.100

Two things that biomedical has invented or innvated

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

What’s the scientific notation for the number 6,840,000,000