1f - ionic bonding Flashcards
what is an ion?
an electrically charged atom or group of atoms formed by the loss/gain of electrons
True or false?
ions form to obtain a full outer shell of electrons
True
Are anions positive or negative ions
anions are negative ions
How are anions formed
Anions are formed when atoms again elections
True or false
cations are formed by ions losing electrons
False
do metals lose or gain electrons to other atoms?
they lose electrons
why do non-metals gain electrons?
to obtain a full outer shell of electrons.
what type of ion do metals usually form?
cations/positive ions
give two reasons why cations are positively charged.
- they lose electrons
- they have more protons than electrons
what is the charge of a group 2 ion?
2+
what is the charge of a group 7 ion?
1-
which group of the periodic table forms 3- ions?
group 5
what does a dot and cross diagram show?
the transfer of electrons between atoms to form ions in an ionic bond.
what is formed when an atom loses an electron?
a positively charged ion/cation
what type of forces hold ionic compounds together?
strong electrostatic forces of attraction between oppositely charged ions.
true or false?
ionic compounds have high melting points and boiling points.
true.
because they have strong electrostatic forces holding the ions together.
what is the structure of ionic compounds called?
a giant ionic lattice
are ionic compounds usually solid or liquid at room temp?
solid
what are electrostatic forces?
the attractive (or repulsive) forces between charged particles.
why are ionic compounds soluble in water?
because they are polar
in an ionic lattice, what direction do the electrostatic forces act in?
all directions
in an ionic solution, what movement allows electrical current flow?
the movement of ions
describe the structure of a giant ionic lattice
a series of positively charged ions in an alternating pattern.
