Consider oxygen, which has an atomic number of 8 and an atomic mass of 16. how many valence electrons does it have? a. 2

Which electron configuration represents the electrons of an atom in an excited state? (1) 2-1 (3) 2-8-7 (2) 2-7-4 (4) 2-4

If you have a negative ion, what happened to the outer shell of the atom?

Many radioactive atoms that have large masses undergo radioactive decay by releasing a particle that is identical to a helium-4 nucleus

38. An average adult has a total lung capacity of 6.0 L. How many total grams of air could be held in the lungs at a pressure of 102 kPa and a normal body temperature of 37 Celsius? (Assume that the average molar mass of air is 29 g/mol.)

How does pressure affect the solubility of a gas? A. Pressure has little effect on the solubility of a gas. B. Decreasing the pressure increases the solubility of a gas. C. Increasing the pressure makes the gas less soluble. D.

What does the dashes line represent? A. Medium B. Boundary C. Normal D. Incident Ray

Only a small amount of cerium oxide nanoparticles is needed because the nanoparticles ... 1) are elements 2) are very reactive 3) have a high surface area to volume ration

Describe the solubility of water compared to ethanol?

When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous Endothermic

The solubility of carbon dioxide gas in water can be increased by