Ch. 11 Elements & Chemical Bonds

Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule.

• True

• False

The properties of a compound are the same as the properties of the elements making up the compound.

• True

• False

When an atom gains or loses electrons, the charged particle that results is called an ion.

• True

• False

The chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atoms do. The hydrogen chloride molecule is therefore a polar covalent molecule.

• True

• False

Most atoms are chemically unstable when its outer energy level 8 valence electrons.

• True

• False

Which of the following is a compound?

• gold

• oxygen

• neon

• water

Aluminum oxide is a chemical formula with two aluminum atoms and three oxygen atoms. Which is the correct chemical formula?

• A1₂O₃

• 2AlO₃

• (A1₂)O₃

• Al₃O₂

Atoms that gain electrons become ions with a _____ charge.

• negative

• equal

• like

• positive

In general, nonmetals are ____.

• good conductors of electricity

• gases at room temperature

• malleable and ductile

• good conductors of heat

What type of bond is pictured in the image ?

• covalent bond

• metallic bond

• ionic bond

• electron bond