An element has an atomic number of 22 what is the total number of valance electrons?

Taking small items, such as loaves of bread or extra kitchen utensils, won't have any effect in the workplace. A) True B) False

Why is this reaction considered to be exothermic? a Because energy difference A is greater than energy difference C. b Because energy difference A and energy difference C are about equal.

Why is potassium less reactive than silver

Which best describes the effect of J. J. Thomson's discovery? A. The accepted model of the atom was changed. B. The accepted model of the atom was supported. C. Cathode ray tubes were no longer used in experiments due to poor results. D.

A container at stp contains 3.46 moles of neon gas. What is the volume of the neon gas?

The van der Waals forces of attraction between molecules always become stronger as molecular size 1) decreases, and the distance between the molecules increases 2)) increases, and the distance between the molecules decreases 3) decreases, and the

Which civilization formed a confederation thay may have impacted the us government A. Powhatan B. Algonquian C. Iroquois D. Anasazi

Jasmine breathed against the window pane and noticed that her breath made a spot on it from the water vapor in her breath. Which stage of the water cycle does this show? A. precipitation B. evaporation C. condensation D. transpiration

Amber has developed a line of organic lotions and handmade soaps with unique, herb-based scents and a touch of bee balm. She plans to sell these products to the wealthy residents of a nearby resort town.

Two pure elements react to form a compound. One element is an alkali metal, X, and the other element is a halogen, Z. Which of the following is the most valid scientific claim that can be made about the compound? a. It has the formula XZ2 b.