Many elements that are essential for life, including nitrogen, oxygen, and carbon, are part of what classification?

A. Metalloids

B. metals

C. noble gases

D. nonmetals

How many valence electrons are available for bonding in silicon? four five eight fourteen

Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. the atoms are hold together by a

A normal force of 38 newtons acts on a book lying on a table. If the coefficient of static friction is 1.2, what is the minimum applied force required to slide the book?

Which of the following compounds is an Arrhenius base? Which of the following compounds is an Arrhenius base? A.) CH3OH B.) HOCl C.) CH3CO2H D.) SrOH

Which element is chemically similar to chlorine?

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

Why do airbags fill evenly with gases?

In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? (A) SO3 (g) + NO (g) ↔ SO2 (g) + NO2 (g) (B) 2 N2 (g) + O2 (g) ↔ 2 N2O (g) (C) 4 NH3 (g) + 3 O2 (g) ↔ 2 N2 (g) + 6 H2O (g) (D) 2 SO2 (g) + O2 (g) ↔ 2

Which tool is most suitable for a chemist to measure the mass of a liquid