What is the number of valence electrons in an atom of Al?

a. 13

b. 3

c. 10

d. 8

Consider two gas cylinders of the same volume and temperature, one containing 1.0 mol of propane, C3H8, C3H8, and the other 2.0 mol of methane, CH4. CH4. Which of the following statements is true? A.

Solid ZnCl2 and liquid ZnCl2 have different (1) empirical formulas (3) ion ratios (2) formula masses (4) physical properties

Calculate the mass, in grams, of Avogadro's number of fluorine atoms. Enter your answer in the provided box. I g/mol

What is the gaseous form of water known as? a. Steam c. Smoke b. Ice d. Fog

Blank is the bending of rock layers due to stress What is blank used in the sentence?

Why do cells have a limit to how big or small they can be?

Which of the following subatomic particles is found the farthest from the center of the atom? a. A neutral particle that is found in the electron cloud b. A negative particle that is found in the nucleus c.

The nonmetals in groups 5a, 6a, and 7a question 15 options: lose electrons when they form ions. form ions with charges of 3-, 2-, and 1-, respectively. form positively charged ions. form ions with a numerical charge equal to their group number.

How many protons are in a electrons?

What is the sum of the numbers of neutrons and electrons in the ion 208 Pb2+?