Download Review for Bonding Test

Review for
Bonding Test
Bohr Diagrams
“K” holds 2 e“L” holds 8 e“M” holds 18 e“N” holds 32 eThe farther away
from the nucleus,
the more energy
the electrons have.
K
L
M
N
Those on the outermost energy level
are the valence
electrons used in
bonding.
Draw a Bohr Diagram
of Oxygen
Oxygen has an
atomic number of 8.
How many electrons are needed in the
outer energy levels for an atom to be
chemically stable?
Eight (Octet Rule)
If an atom has 15 electrons, how many
valence electrons does it have?
5
C 14 (C) has how many neutrons?
14 because the 14 is telling you that it is an
isotope and has more neutrons than protons.
Li 7 (Li) has what mass number?
Lithium has 3 as it’s atomic number,
therefore it has 3 protons. Add the 7
neutrons from this isotope and the
mass number is 10 amu.
Compounds that contain carbon and were
once living are known as…?
Organic
Family # 17 is known as the “SaltProducing” elements. What are they?
Halogens
Where are the lightest (lowest mass)
elements located on the periodic table,
Left or Right side?
Left side
Which is the lightest of all the elements?
Hydrogen (H)
What is the molecular mass of water (H2O)?
H = 1, O =16………1 + 1 + 16 = 18 amu.
What is the difference between a molecule
and a compound?
A molecule is formed when two or more atoms
join together chemically. A compound is a
molecule that contains at least two different
elements.
All compounds are molecules but not all
molecules are compounds.
Which of these is a compound?
He, HCl, H2O, H2, N2
HCl and H2O
How many different elements are in the
compound sodium carbonate (Na2CO3)?
3; Na, C and O
How many atoms does the above compound
have?
6
Lewis Dot Diagrams show what part of an
element?
Valence electrons only.
What does the following Lewis Dot structure
show?
Carbon is sharing 4 SETS of electrons with
Oxygen and they all are now stable with
8 valence electrons each.
A chemical bond that occurs when atoms share
electrons is a(n) _______ bond.
Covalent Bond
Covalent Bonds occur between what two types
of elements?
Non-Metals
Non-metals are located where on the Periodic
table?
To the right of the stair-step metalloids
(B, S, G, A, S, T, P, A). Exception - Hydrogen
What kind of chemical bond occurs when
an equal exchange of electrons occurs?
Ionic Bond
What is the name for losers of electrons that
form positive ions?
Cations
What is the name for gainers of electrons that
form negative ions?
Anions
Ionic bonds occur between which two types
of elements?
A metal and a non-metal
Which type of elements are UNLIKELY to form
bonds?
Noble Gases
How can you quickly determine if a Lewis Dot
Structure is showing an Ionic bond?
It is between a metal and a non-metal and
it will show a sign (+ or -)
How do you name an ionic bond between
a metal and a non-metal?
Metal comes first (leave name the same)
Nonmetal second (Use “ide” ending)
How do you name a covalent bond between
two non-metals?
Put Greek prefixes in front of the elements
names to tell how many atoms there are.
What are the names of the following?
NaCl , CO, CO2 and N2O4
Sodium Chloride, Carbon Monoxide, Carbon
Dioxide and Dinitrogen Tetroxide
What are the Greek Prefixes for the following?
1 thru 10
1- Mono
2- Di
3-Tri
4- Tetra
5- Penta
6- Hexa
7- Hepta
8- Octa
9- Nona
10- Deca
What does this cartoon mean?
What does this cartoon mean?