What is the change in electrons for sulfur in the following reaction?
SO2 (aq) + Cr2O7^2-(aq) -> SO4^2- (aq) + Cr^3+ (aq)

A. Gain 3 electrons
B. Gain 5 electrons
C. Lose 2 electrons
D. Lose 1 electron

There are main groups in the modern periodic table of elements

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

What is the main purpose of patent attorneys? defend the company against legal claims manage financial investments invent new products protect rights to new products and processes