What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons? Selenium atom A. Se6 + B. Se2 + C. Se6 - D. Se2-

Mori walks into a restaurant. Upon smelling the food cooking, her mouth starts to water. Which system in the body detected the information and communicated it to the body? A. nervous system B. digestive system C. circulatory system D. immune system

Krypton is named after the Greek word that means "secret." Which explains why krypton was most likely given this name?

Compare the state of plasma to the other states of matter

Hydrazine, N2H4, is a corrosive liquid used in rocket and jet fuels. Ammonia, NH3, is a gas that dissolves in water to form a solution that can be used as a cleaning agent.

Which of the following statements about metalloids is true? Metalloids always readily donate electrons in a chemical reaction. The properties of metalloids are constant regardless of the surrounding environment.

Which of the following occurs as water vapor cools in the atmosphere? condensation transpiration precipitation evaporation

What is a polyatomic ion? Consulting p. 117 in text, list the formulas and names of at least 10 polyatomic ions.

What is the ionic composition and osmolarity of "physiological saline" - the intravenous fluid drip you receive at a hospital?

Why do dipoles cancel out?

Match each chemical with the correct use. 1. x-ray soft tissue organs 2. reduce pain and fever 3. anesthetic 4. treat acne A. benzoyl peroxide B. nitrous oxide C. acetylsalicylic acid D. barium