Although group 7a ions may have different oxidation states depending on which other elements are in the compound, the most common oxidation number for group 7a (group 17) ions is:

1−

3+

5+

7+

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?