Unit 2 - Chemistry of Life - Quiz 2: Properties of Compounds
Which substance, when dissolved in water, will produce a hydrogen ion plus an anion?
an acid
The reactivity of an atom is due to the number and arrangement of_________ in the outer energy level.
electrons
If an atom loses or gains an electron, it is called a(n) _______.
ion
Atoms which transfer electrons can combine to form a(n) ______ bond.
ionic
Chemical reactions are the result of an atom attempting _____.
to rearrange its configuration to result in a stable octet
A substance that releases hydrogen ions in water is a base. True or False
False
Of the known elements only about ten are needed by living things. True or False
False
Sodium and chlorine atoms combine readily because they both tend to lose electrons. True or False
False
The number of protons within an atom of an element is equal to its atomic mass. True or False
False
Water can dissolve only inorganic compounds. True or False
False
When a salt dissolves in water, it produces either a hydrogen ion or a hydroxyl ion. True or False
False
An atom that has gained or lost electrons is called an ion. True or False
True
The symbol Na + represents a sodium atom that has lost an electron. True or False
True
Water is an example of a compound. True or False
True
Atoms that form compounds are held together by chemical bonds. The bond that includes sharing electrons with another atom is called ________.
covalent
If the outer energy level of the atom is full, it ________ react readily with other atoms. does does not
does not
(Select all that apply.) Choose the three types of bonds introduced. ionic compound covalent oxygen hydrogen molecular
ionic covalent hydrogen
If an atom has twelve electrons, how many electrons are in the n=1 energy level? How many electrons are in the n=2 energy level? How many electrons are in the n=3 energy level?
n = 1 2 n = 2 8 n = 3 2
When an atom gains an electron, it becomes ______ charged.
negatively
A solution that contains equal numbers of hydrogen and hydroxide ions would be called:
neutral
When an atom loses an electron, it becomes _______ charged
positively
