Radon 222 has a half life of 4 days. If 16g of radon accumulates, how much is left in 20 days

To achieve a complete set of valence electrons, atoms must fulfill the octet rule. What must atoms do to obey this rule?

19) How many grams are in 5 lbs.? (2.2 lbs = 1000 g)

What would you be most likely to measure be immersing an object in water and seeing how much the water level rises?

Of the elements magnesium, calcium, and barium, which will form the ion with the largest radius?

Based on the following chararistics, classify the state of matter: high energy found in stars consists of freely moving charged particles A. liquid B. Gas C. Plasma D. Solid

Which net change occurs in a nuclear fusion reaction? (1) Ionic bonds are broken. (2) Ionic bonds are formed. (3) Energy is converted to mass. (4) Mass is converted to energy.

You have a 1 L container of a gas at 20 C and 1 atm. Without opening the container, how could you tell whether the gas is chlorine or fluorine? a. measure the mass of the gas b. measure the speed of the gas molecules c.

In a pan of boiling water, the water moves in a circular motion.

In the following reaction, which component acts as an oxidizing agent? 10 I - (aq) + 2 MnO4 - (aq) + 16 H + (aq) → 5 I2 (s) + 2 Mn2 + (aq) + 8 H2O (l)

Classify each of the following as a suspension, solution, or colloid. - suspension - solution - colloid A. gasoline B. blood C. mud