Chem H Unit 6 Bonding Test Review

Front

Which types of elements become cations?

Back

Metals lose electrons to become positively charged ions, known as cations.

Front

What is the shape of a molecule with a trigonal planar geometry?

Back

A trigonal planar molecule has three atoms bonded to a central atom, all in the same plane, forming a 120-degree angle between them.

Front

What does a partial negative charge indicate in a molecule?

Back

A partial negative charge indicates that an atom has a higher electronegativity, attracting electrons more strongly than other atoms in the molecule.

Front

Why does ice float on liquid water?

Back

Ice is less dense than liquid water due to the hydrogen bonds that hold water molecules in a structured lattice, making ice expand.

Front

What type of bond is found between water molecules?

Back

Hydrogen bonds are weak attractions between the partial positive charge of hydrogen atoms in one water molecule and the partial negative charge of oxygen atoms in another.

Front

What is a cation?

Back

A cation is a positively charged ion formed when an atom loses one or more electrons.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of chemical bond where electrons are shared unequally between two atoms, resulting in partial charges.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the significance of electronegativity in bonding?

Back

Electronegativity measures an atom's ability to attract and hold onto electrons, influencing bond type and molecular polarity.

Front

What is the molecular geometry of water (H2O)?

Back

Water has a bent molecular geometry due to the two lone pairs of electrons on the oxygen atom, creating a bond angle of about 104.5 degrees.