Which of the following element is the smallest?

A. Strontium (Sr)

B. Magnesium (Mg)

C. Beryllium (Be)

D. Calcium (Ca)

Which change would increase the pressure exerted by a gas?

Describe an ionic bond in terms of the atoms' electronegativity values and what has happened to the electrons involved in the bond.

Does cell respiration store energy in organic compounds or release energy from organic compounds?

Which substance is a diatoic molecule? A] He B] O2 C] CO2 D] H2O

What is the difference between periods and groups on the periodic table?

The production of ammonia (NH3) is exothermic and is in equilibrium with its breakdown (which is endothermic): N₂ + 3H₂ ⇋ 2NH₃ If the concentration of H2 is decreased, will the equilibrium shift to produce more or less ammonia? Justify your answer.

Modern scientists use a version of the metric system called

How many protons does an atom of Iodine (I), #53, have if it has an atomic mass of 127?

Which pH range is more acidic than most freshwater lakes, streams, and ponds? A. 3 to 5 B. 6 to 8 C. 10 to 12 D. 12 to 14

If the initial concentration of xy is 0.050 m, what is the concentration of xy after 55.0 s?