HS chem U3-2

What is an ion?

• An electrically charged atom or group of atoms formed by the loss or gain of electrons

• A stable arrangement of electrons in the outer shell of an atom

• A compound formed by the reaction between a metal and a non-metal

• A diagram that shows the arrangement of electrons in an ionic compound

Why do atoms lose or gain electrons to become ions?

• To form a full outer shell of electrons, which is a more stable arrangement

• To increase the number of protons in the nucleus

• To decrease the atomic mass of the atom

• To form covalent bonds with other atoms

What is the electronic configuration of an ion?

• The same as that of a noble gas

• The same as that of a metal

• The same as that of a non-metal

• The same as that of a covalent compound

Which statement is true about the formation of a sodium ion?

• Sodium gains electrons to become negatively charged

• Sodium loses electrons to become positively charged

• Sodium shares electrons with other atoms

• Sodium does not form ions

Which statement is true about the formation of a chloride ion?

• Chlorine gains electrons to become positively charged

• Chlorine loses electrons to become negatively charged

• Chlorine shares electrons with other atoms

• Chlorine does not form ions

What is an ionic bond?

• A strong electrostatic force of attraction between positive and negative ions

• The bond formed between two non-metal atoms

• A bond formed by the sharing of electrons

• A bond formed by the transfer of protons

What do dot-and-cross diagrams show?

• The arrangement of outer-shell electrons in an ionic or covalent compound

• The arrangement of protons and neutrons in an atom

• The arrangement of electrons in the nucleus of an atom

• The arrangement of electrons in a covalent compound

Which elements react together to form ionic bonds?

• Metals and non-metals

• Metals and metals

• Non-metals and non-metals

• Metals, non-metals, and metalloids

What is the formula of sodium chloride?

• NaCl₂

• Na₂Cl

• NaCl

• Na₂Cl₂

What is the overall charge of an ionic compound?

• Positive

• Negative

• Neutral

• Variable