The most negative electron affinity is most likely associated with which type of atoms?

A. large nonmetal atoms

B. small nonmetal atoms

C. large metal atoms

D. small metal atoms

Fluorine has 7 valences

Which of these properties is a physical property of aluminum? A.) Aluminum rusts when it is exposed to moisture and air. B.) Aluminum is a good conductor of heat. C.) Aluminum reacts with oxygen to form aluminum oxide. D.

Explain how the amount of energy required to raise the temperature of an object is calculated

The half-life of radioactive element krypton-91 is 10 seconds. if 16 grams of krypton-91 are initially present, how many grams are present after 10 seconds? after 50 seconds?

Without doing a calculation, predict whether the entropy change will be positive or negative when the following reaction occurs in the direction it is written. a. CO2 (g) + 2H2 (g) → CH3OH (l) b. Br2 (l) + H2 (g) → 2HBr (g) c.

Which compound forms a green aqueous solution

Sulfur dioxide gas (SO2) reacts with excess oxygen gas (O2) and excess liquid water (H2O) to form liquid sulfuric acid (H2SO4). In the laboratory, a chemist carries out this reaction with 67.2 L of sulfur dioxide and gets 250 g of sulfuric acid.

Which of the following ions came from an atom that gained 2 electrons? A. 0^2- B. Li+ C. Mg^3+ D. N^3-

Anesthetic gases. one type of gas mixture used in anesthesiology

A student investigated the rate of reaction between sodium thiosulphate and dilute hydrochloric acid the student placed a conical flask over a cross on a piece of paper the student mixed the solutions in the flask the solution went cloudy the