Quiz 2: Properties of Compounds – Flashcards

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

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

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

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

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

Water is an example of a compound.

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

A salt is produced when an acid reacts with a base.

A solution that contains equal numbers of hydrogen and hydroxide ions would be called:

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? Answer in the form: n=1 shell __, n=2 shell __, n=3 shell __

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

If the outer energy level of the atom is full, it ________ react readily with other atoms. A. does B. does not

Atoms that form compounds are held together by chemical bonds. The bond that includes sharing electrons with another atom is called _____ A. covalent B. hydrogen C. ionic

If an atom loses or gains an electron, it is called a(n) _____

When an atom gains an electron, it becomes _____ charged. A. negatively B. positively

When an atom loses an electron, it becomes _____ charged A. negatively B. positively

Atoms which transfer electrons can combine to form a(n) _____ bond. A. covalent B. hydrogen C. ionic

Choose the three types of bonds introduced. A. ionic B. molecular C. compound D. covalent E. hydrogen F. oxygen

Chemical reactions are the result of an atom attempting _____. A. to reduce the number of electrons B. to become electrically neutral C. to rearrange its configuration to result in a stable octet D. add sufficient electrons to complete its outer shell

Water can dissolve only inorganic compounds.

A substance which yields an anion plus a proton is a(n): A. salt B. acid C. base