CH 6.2 AND 6.3

A chemical bond in which two atoms share a pair of valence electrons is

• covalent bond

• chemical bond

• ionic bond

• metallic bond

A neutral group of atoms that are joined together by one or more covalent bonds is

• molecule

• compound

• ion

• polyatomic ion

Tags

NGSS.HS-PS1-1

In a covalent bond, the atoms are held together by the attractions between the shared electrons and the protons in each nucleus.

• true

• false

Nitrogen (N) has 5 valence electrons. How many pairs of electrons must two nitrogen atoms share in order for each atom to have eight valence electrons?

• zero

• one

• two

• three

Tags

NGSS.HS-PS1-2

Elements at the ___ of a group have a greater attraction for electrons than elements at the ______ of a group have.

• top, bottom

• bottom, top

• left, right

• right, left

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In a hydrogen chloride molecule, the shared electrons spend more time near________.

• chlorine

• hydrogen

• they are shared equally

A covalent bond in which electrons are not shared equally is called a

• polar covalent bond

• nonpolar covalent bond

• covalent bond

• ionic bond

Tags

NGSS.HS-PS1-1

When atoms form a polar covalent bond, the atom with the greater attraction for electrons has a partial ________ charge.

• negative

• positive

• neutral

In a molecule of a compound, electrons are always shared equally by both atoms.

• true

• false

What factor determines whether a molecule is polar or nonpolar?

• the number of atoms in the molecule

• the type of atoms in the molecule

• the number of bonds in the molecule

• the shape of the molecule