As the first five elements in Group 15 are

considered in order of increasing atomic number,

first ionization energy

(1) decreases

(2) increases

(3) decreases, then increases

(4) increases, then decreases

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2 (s) + 2h2o (l) → ca (oh) 2 (aq) + 2h2 (g) how many grams of cah2 are needed to generate 58.0 l of h2 gas at a pressure of 0.811 atm and a temperature of 32°c?

Whats the difference between magnification and resolution (for science)

If p = mv, what does v = ? (Solve for v)

The molecules of which phase of matter contain the least amount of kinetic energy? a. solids b. liquids c. gases

Which of the following is not an intensive physical property?

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.

What is a Binary Compound? Is it related to the Ionic and Molecular compounds? if so, how so?

Which answer correctly describes the difference between covalent and ionic bonds? A. ionic: transfer of protons covalent: transfer of electrons B. ionic: transfer of electrons covalent: transfer of protons C.

What are the first five elementsof the periodic table?

Name 3 characteristics that can be used to identify minerals