Chemical Bonds Flashcards
why are electrons important?
they play a role in chemical bonding.
what is a chemical bond?
a chemical bond is the force that holds atoms together.
how does the chemical bond occur?
chemical bonds arise as a result of gaining, losing, or sharing of electrons between atoms.
there are several types of chemical bonds which are?
covalent bonds, ionic bonds, and hydrogen bonds.
what is a covalent bond?
sharing of a pair of valence electrons.
what is a molecule?
a molecule consists of two or more atoms held together by covalent bonds.
what is a single bond?
sharing of one pair of electrons.
what is a double bond?
sharing of two pairs of valence electrons.
is o2 a compound?
no o2 is not a compound. a compound is two or more different elements.
- a molecule consists of two or more atoms held together by covalent bonds.
covalent bonds can be?
nonpolar or polar.
the type of bond: polar or nonpolar: depends on?
the type of bond depends on the electronegativity of the atoms involved.
in the nonpolar covalent bond…?
the atoms have similar electronegativities and share the electrons equally.
in a polar covalent bond…?
the atoms have differing electronegativities and share the electrons unequally.
what is electronegativity?
refers to the ability of an atom to pull a shared electron more towards itself.
ex: oxygen, nitrogen
what are ions?
atoms that are charged.
- have more or fewer electrons than usual.
anion vs cation?
anion is a negatively charged ion and a cation is a positively charged ion.
what is an ionic bond?
an attraction between anions and cations.
is nacl a compound?
yes, it is a compound.
what is a hydrogen bond?
- weak chemical bonds
- results when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom.
