Exam 2: The Nature of Molecules and the Properties of Water

Atoms containing a specific number of protons are called:

Consider the following electronegativity values: Boron (B) = 1.8 Carbon (C) = 2.5 Chlorine (Cl) = 3.2 Selenium (Se) = 2.6 Which of the following bonds is the most polar?

Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions.Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell.How are the electrons transferred between these atoms?

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ______ of energy to break hydrogen bonds.The energy is _____ from heat produced by your body, thus helping to lower the surface temperature of your body.

You identify an enzyme involved in a cellular reaction.How does the enzyme affect the reaction equilibrium between reactants and products and the time needed to reach equilibrium?

The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s²2s²2p⁶.What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?

Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced.Bicarbonate is acting as a ____ in blood.

Water molecules are polar with ends that exhibit partial positive and negative charges.These opposite charges allow water molecules to attract each other through:

An atom has 20 electrons and 20 neutrons.What is the mass of this atom?

Which atomic particle has no charge and is located in the nucleus?

Atoms of a single element that possess different numbers of neutrons are called:

An atom that is negatively charged because it has accepted an electron is a(n):