What are atomic number

Which of the following processes involve radioactivity? car batteries airport security smoke detectors light bulbs (can have more than one answer)

How many molecules are in CH3OH if there are 40grams

Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na to Cl? (1) Electronegativity increases, and first ionization energy decreases.

75. In Canada and the United Kingdom, devices that measure blood glucose levels provide a reading in millimoles per liter. If a measurement of 5.3 mM is observed, what is the concentration of glucose (C6H12O6) in mg/dL?

Calculate the atomic mass of element X if there are two isotopes of this element (X-24 and X-28) and 75% of all X atoms are X-28 isotopes? 52 amu 26 amu 4 amu 27 amu

Gamma ray Ultra- violet Infrared Radio H. X-rays Visible Microwave Which electromagnetic wave transfers the most energy? infrared microwaves radio waves X-rays Frequency (Hz) 1015 1013 1021 1019 107 10" 109 107 Intro Done

If a 9.983 g sample of calcium sulfate dihyrate was heated in a crucible under the correct conditions, how many grams of water should be lost?

What group of elements has the most stable arrangement in their outer energy level?

Which of the follwing is a pure substance: sugar, salt, water, or pepper? Explain how you know.

A chemistry student needs of isopropenylbenzene for an experiment. She has available of a w/w solution of isopropenylbenzene in carbon tetrachloride. Calculate the mass of solution the student should use.