Ttakes 7.21 ⋅ 10 − 19 j of energy to remove an electron from an iron atom. what is the maximum wavelength of light that can do this?

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

How are the terms group and period used on the periodic table