1. If you drop a marble into a glass of
water, the marble will sink because
its ____________________ is
greater than that of water.
2. If you drop a marble into a glass of
water, the marble will sink because its
DENSITY is greater than that of water.
To the left is Mercury. It is a liquid at room
temperature and is very dense so a pool ball
will float on top if it.
3. The tarnishing of metal is an example
of a(n) ____________________
change
4. The tarnishing of metal is an example
of a CHEMICAL change.
The metal has oxidized and has a
different chemical makeup where it
has tarnished.
5. Dissolving a spoonful of sugar in tea or
coffee is an example of a(n)
____________________ change.
6. Dissolving a spoonful of sugar in tea or
coffee is an example of a PHYSICAL
change. You could still physically
separate the dissolved substance from
the liquid by filtering or distilling.
7. The atom is made of 3 parts. The
______________ with a positive
charge, the_____________ with a
negative charge, and the
______________ with no charge.
8. The atom is made of 3 parts. The
PROTON with a positive charge, the
ELECTRON with a negative charge, and
the NEUTRON with no charge.
9. The property of an element that
indicates the number of protons in its
atoms is the ____________________.
10. The property of an element that
indicates the number of protons in its
atoms is the ATOMIC NUMBER.
11. The fact that matter is not created or
destroyed in any chemical or physical
change is called the law of
CONSERVATION OF MASS.
12. Which group of metals is so reactive
that the metals are never found as
uncombined elements in nature?
13. Which group of metals is so reactive
that the metals are never found as
uncombined elements in nature?
ALKALI METALS
http://www.youtube.com/watch?feature=player_detailpage&v=uixxJtJPV
15. In the laboratory, volumes of
liquid are usually measured
with a GRADUATED CYLINDER
16. The units liter, milliliter, and cubic
centimeter are all used to measure
the ____________________ of an
object or substance.
17. The units liter, milliliter, and cubic
centimeter are all used to measure
the VOLUME of an object or
substance. ALWAYS include the
unit of measurement in your
answer.
23. • A material is said to be ductile if it…
• CAN BE STRETCHED INTO A WIRE.
24. What is the mass of 500 cm3 of
PURE liquid water? Explain.
25. What is the mass of 500 cm of
PURE liquid water? Explain.
500 grams because
1 ml/cc/ cm3 of pure water has a
mass of 1 gram.
Water has a density of 1.
D=M/V
D=1gram/1ml
3
26. What name is given to the elements in Groups 3
through 12? How do their properties tend to
compare with the elements to the left and right
of these groups?
27. What name is given to the elements in Groups 3
through 12? How do their properties tend to compare
with the elements to the left and right of these
groups?
Transition metals. They are less reactive
than the metals in Groups 1 and 2 to their
left; they tend to be more reactive than the
metals to their right.
28. Tell how you could use a ruler to
determine the volume of a box.
29. 1) Measure the length, width, and height of the box
2) VOLUME= length x width x height
3) Make sure to include UNIT OF MEASUREMENT (cc, ml, L, etc)
http://www.youtube.com/watch?v=JijhDDJvExo&fea
30. Which group of elements
have some properties of
metals and some properties
of nonmetals?
31. Which group of elements have
some properties of metals and
some properties of nonmetals?
Metalloids
33. Which reaction is exothermic?
Reaction A is exothermic. An exothermic reaction
is a reaction in which energy is released.
Reaction A shows an increasing temperature,
meaning that it is releasing energy, not
absorbing it.
35. Which reaction is endothermic? Explain.
Reaction B is endothermic. An
endothermic reaction is a reaction in
which energy is taken in. Reaction B
shows a decreasing temperature,
meaning that it is taking in energy, not
releasing it.
36. What do the COLUMNS in the
periodic table tell you?
37. What do the COLUMNS in the periodic table tell you?
The periodic table has a special name for its columns, too. When a column
goes from top to bottom, it's called a group. The elements in a group have
the same number of electrons in their outer orbital. Every element in the first
column (group one) has one electron in its outer shell. Every element on the
second column (group two) has two electrons in the outer shell. As you keep
counting the columns, you'll know how many electrons are in the outer shell.
There are some exceptions to the order when you look at the
transition elements, but you get the general idea.
38. In general, which of the following
statements about metals is true?
a Metals need to be stored in sealed
. containers for safety.
b Metals do not react with oxygen.
.
c Metals are malleable, ductile, and can carry
. an electric current.
d Metals are highly reactive substances.
.
39. c. Metals are malleable, ductile, and can carry an
electric current.
HOW DO YOU IDENTIFY A METAL?
What are the characteristics of metals? We've got four traits that will help you identify whether an element is a metal or not.
Conduction: Metals are good at conducting electricity. Silver (Ag) and copper (Cu) are some of the most efficient metals and are
often used in electronics.
Reactivity: Metals are very reactive, some more than others, but most form compounds with other elements quite easily. Sodium
(Na) and potassium (K) are some of the most reactive metals.
Chemical: A little complex here. Metals usually make positive ions when the compounds are dissolved in solution. Also, their
metallic oxides make hydroxides (bases) (OH-) and not acids when in solution. Think about this example. Sodium chloride (NaCl),
when dissolved in water, breaks apart into sodium (Na+) and chlorine (Cl-). See that sodium is the positive ion? Sodium is the metal.
It works that way for other metals. Potassium chlorine (KCl) works the same way.
Alloys: Metals are easily combined. Mixtures of many elements are called alloys. Examples of alloys are steel and bronze.
41. Why does ice float?
Ice floats because it is LESS dense in its
frozen state. It is less dense because
its volume increases. If you have ever
put a coke in the freezer for to long
you know what I am talking about.
43. •
In the periodic table, the most
reactive metals are found
Let's start on the left side of the periodic table. When looking for families,
the first one you will find is the alkali metal family of elements. They are
also known as the alkaline metals.
44. In an atom, the number of protons
equals the number of…
45. In an atom, the number of protons
equals the number of ELECTRONS.
(usually)
because nature wants balance.
46. MMMMMKAAAY!
This will help with the test but your paper
study guide is more complete. If you can
NOT answer all the blank questions of your
SG without looking at your answers you
have not studied enough. Study until you
know it ALL.
