Chapter 02 Core Content Activity: Covalent Bonds

Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine have?

10

This atom can form up to _____ single covalent bond(s).

4

What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?

6

The tendency of water molecules to stick together is called _

Cohesion

Which of these figures correctly illustrates the nature of the bonding of H2O?

Oxygen is more electronegative than hydrogen.

In a neutral solution the concentration of __

The solution on the right is basic relative to the solution on the left.

Which of these refers to atoms with the same atomic number but different atomic masses?

These atoms are isotopes.

An ionic bond involves ____

an attraction between ions of opposite charge

Atoms with the same number of protons but with different electrical charges

are different ions

A substance that resists changes in pH is referred to as a(n)

buffer

What type of bond is joining the two hydrogen atoms?

covalent

A(n) _____ bond joins these two oxygen atoms.

double covalent

Substances that cannot be broken down into other substances are called _

elements

The brackets are indicating a(n) _____ bond.

hydrogen

What name is given to the bond between water molecules?

hydrogen

What is the arrow pointing to? (pointing to a positive h20 looking molecule

hydrogen ion

In a neutral solution the concentration of __

hydrogen ions is equal to the concentration of hydroxide ions

What is the arrow pointing to? (pointing to a negative h20 looking molecule)

hydroxide ion

What is the term for an atom that is electrically charged as a result of gaining or losing electrons?

ion

In salt, what is the nature of the bond between sodium and chlorine?

ionic

A(n) _____ refers to two or more atoms held together by covalent bonds.

molecule

In an atom with a neutral overall charge, the number of protons is equal to the _

number of electrons

What is the pH inside most living cells?

pH 7

What type of bond joins the carbon atom to each of the hydrogen atoms?

single (nonpolar) covalent