Biology - Quiz 2: Properties of Compounds

The symbol Na + represents a sodium atom that has lost an electron.

true

Chemical reactions are the result of an atom attempting _____.

to rearrange its configuration to result in a stable octet

An atom that has gained or lost electrons is called an ion.

true

Water is an example of a compound.

true

Which substance, when dissolved in water, will produce a hydrogen ion plus an anion?

an acid

If the outer energy level of the atom is full, it ________ react readily with other atoms.

does not

The reactivity of an atom is due to the number and arrangement of _________ in the outer energy level.

electrons

A substance that releases hydrogen ions in water is a base.

false

Of the known elements only about ten are needed by living things.

false

Sodium and chlorine atoms combine readily because they both tend to lose electrons.

false

The number of protons within an atom of an element is equal to its atomic mass.

false

Water can dissolve only inorganic compounds.

false

When a salt dissolves in water, it produces either a hydrogen ion or a hydroxyl ion.

false

(Select all that apply.) Choose the three types of bonds introduced.

ionic covalent hydrogen

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

Atoms that form compounds are held together by chemical bonds. The bond that includes sharing electrons with another atom is called ________.

covalent

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