The mass number of a nucleus (except Hydrogen) is:

always less than its atomic number

never less than its atomic number

sometimes equal to its atomic number

sometimes less than and sometimes more than its atomic number

The Second Law of Thermodynamics states that: A) the entropy of the universe increases during a spontaneous process. B) the heat content of the universe increases during a spontaneous process. C) energy is conserved in a spontaneous process.

If you build an atom using two protons two neutrons and two electrons you have built an atom of

How mamy moles of H2O are equivalent to 97.3 grams of H2O

The serum potassium level of a client who has diabetic ketoacidosis is 5.4 mEq/L (5.4 mmol/L). What would the nurse expect to see on the ECG tracing monitor?

What is the difference between a period and a group in the periodic table?

Consider the model of the nitrogen atom. Which electron configuration matches this model? 1s22s22p2 1s22s22p3 1s22s22p4 1s22s22p5

In this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, .

What is the pressure of 2.3 moles of carbon dioxide gas stored in a 2 liter container at a temperature of 423 K? Given: a = 3.59 liters2 ∙ atmospheres/mole2, b = 0.0427 liters/mole, and R = 0.08205 liters∙atmospheres/K∙mole 37.22 atm 41.96 atm 79.

A bird is flying north at 18 m/s. A gust of wind from the North exerts an unbalanced force on the bird. What will happen to the bird's speed?

Calcium fluoride, CaF2, has a molar solubility of 2.1 x 10^-4 mol/L at pH = 7.00. By what factor does its molar solubility increase in a solution with pH = 3.00? The pKa of HF is 3.17 (A) 1.48 (B) 1.83 (C) 2.48 (D) 4.96