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- Multiple ChoicePlease save your changes before editing any questions.
Each energy level of an atom has a maximum number of ______it can hold.
neutrons
protons
electrons
nuclei
- Multiple ChoicePlease save your changes before editing any questions.
Horizontal rows across the periodic table are called
groups
periods
clusters
element
- Multiple ChoicePlease save your changes before editing any questions.
A particle that moves around the nucleus of an atom is a(an)
proton
neutron
electron
element
- Multiple ChoicePlease save your changes before editing any questions.
The four diagrams below model the results of mixing atoms of different substances. Each atom is represented by a different symbol. Which diagram correctly models a chemical change creating a compound?
- Multiple ChoicePlease save your changes before editing any questions.
The positively charged particle in the nucleus of an atom is the
electron
proton
neutron
magnetron
- Multiple ChoicePlease save your changes before editing any questions.
The smallest part of matter is a (an)__________.
nuclues
molecule
atom
proton
- Multiple ChoicePlease save your changes before editing any questions.
Air is considered to be matter because it has
volume and length
protons and electrons
mass and takes up space
color and odor
- Multiple ChoicePlease save your changes before editing any questions.
The number of protons in the nucleus of an atom is called the
element number
mass number
atomic number
weight number
- Multiple ChoicePlease save your changes before editing any questions.
Which statement is a correct interpretation of the data in the graph?
As water temperature increases, solubility decreases.
As water temperature increases, solubility increases.
As water temperature increases, solubility increases and then decreases.
As water temperature increases, solubility decreases and then increases.
- Multiple ChoicePlease save your changes before editing any questions.
As the water temperature is increased from
30°C to 70°C, how many more grams of
substance A will dissolve in 100 grams of water?
*Only look at the line for Substance A- Look at the x-axis for 30°C and find the y-value.
to 70°C and find the y-value.
Subtract the two y-values to find how many more grams dissolves.
20g
50g
40g
90g
- Multiple ChoicePlease save your changes before editing any questions.
The property of being a semiconductor belongs to
noble gases
halogens
metals
metalloids
- Multiple ChoicePlease save your changes before editing any questions.
nuclei
protons
molecules
atoms
- Multiple ChoicePlease save your changes before editing any questions.
The substances that make up a mixture
keep most of their properties
lose most of their properties
are chemically combined
are combined in definite proportions
- Multiple ChoicePlease save your changes before editing any questions.
An example of a homogenous mixture is
oil and vinegar salad dressing
a mixture of salt and pepper
salt water
raisin bran cereal
- Multiple ChoicePlease save your changes before editing any questions.
Some common substances and their chemical formulas are listed in the chart below. Which of these substances are elements?
HINT- ONE Capital Letter = Elements
TWO Capital Letters = Compound!
hydrochloric acid and carbonic acid
carbon dioxide and water
oxygen and helium
water and oxygen
- Multiple ChoicePlease save your changes before editing any questions.
Plastic is used to cover the copper wires in the power cords of appliances because plastic differs from copper in:
*HINT- Copper is a metal (a good conductor...)
density
hardness
phase at room temperature
electrical conductivity
- Multiple ChoicePlease save your changes before editing any questions.
Elements in a group (family) on the periodic table have the same
number of energy levels
number of protons
number of valence electrons
number of protons and neutrons
- Multiple ChoicePlease save your changes before editing any questions.
The formula N2O means
1 atom of N, 2 atoms of O
2 atoms of N, 1 atom of O
3 molecules
2 atoms of N only
- Multiple ChoicePlease save your changes before editing any questions.
A scientist wants to remove and obtain the water from a mixture of salt water. What separation technique should be used?
magnetism
distillation
sieving
evaporation
- Multiple ChoicePlease save your changes before editing any questions.
Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles?
**Think about our Separating Mixtures Lab- how did you separate the iron from the mixture?
Use tweezers to separate them.
Use a magnet to separate them.
Add water to the mixture.
Pour the mixture into a filter.
- Multiple ChoicePlease save your changes before editing any questions.
A mixture of salt, sand, and water is thoroughly stirred. It is then filtered through a filter paper as shown in the diagram to the right. Which substances(s) pass through the filter?
Hint! Think about the Separating Mixtures Lab we did. What happened when you did this?
only the water
only the water and the sand
only the water and salt
the sand, salt and the water
- Multiple ChoicePlease save your changes before editing any questions.
In a solution, the part of the solution that does the dissolving is known as the...
(the one doing the dissolving, not the solid being dissolved)
solute
solvent
water
homogeneous
- Multiple ChoicePlease save your changes before editing any questions.
The property of metal that allows it to be made into a wire is known as
conductor
luster
malleable
ductile
- Multiple ChoicePlease save your changes before editing any questions.
Sodium with a valence electron of 1 will join with Chlorine because Chlorine has
1 valence electron
7 valence electrons
8 valence electrons
18 valence electrons
- Multiple ChoicePlease save your changes before editing any questions.
All of the following are characteristics of both compounds and mixtures except
Compounds and mixtures contain different substances.
Compounds and mixtures can be separated into their different parts using different methods.
The materials that make up compounds and mixtures lose their
characteristics when combined.
Compounds and mixtures can contain more than 2 elements.
- Multiple ChoicePlease save your changes before editing any questions.
The picture shows a method of separating a mixture. Choose the best method for separation for the mixture below.
You can select TWO answers, if applicable!
mixture of sand and water
sea water to obtain the salt
sand and rocks of different sizes
iron filings and sulfur
mixture of sugar and water
- Multiple ChoicePlease save your changes before editing any questions.
What mixture would this method be used to separate?
mixture of sand and water
sand and rocks of different sizes
iron filings and sulfur
mixture of sugar and water
- Multiple ChoicePlease save your changes before editing any questions.
Which mixture would this method be used to separate?
mixture of sand and water
sea water to obtain the salt
sand and rocks of different sizes
iron filings and sulfur
mixture of sugar and water
- Multiple ChoicePlease save your changes before editing any questions.
Which mixture would this method be used to separate?
mixture of sand and water
sea water to obtain the salt
iron filings and sulfur
mixture of sugar and water
- Multiple ChoicePlease save your changes before editing any questions.
When a balloon is rubbed on a wool sweater, the balloon builds up a negative electrical charge. When a glass rod is rubbed on silk, the rod builds up a positive electrical charge. Explain why the charged balloon will be attracted to the charged glass rod.
Opposites attract
Likes repel
They are neutral
- Multiple ChoicePlease save your changes before editing any questions.
Identify the elements that has chemical properties similar to the chemical properties of fluorine.
You should select more than one answer!
Bromine
Neon
Oxygen
Chlorine
Iodine
- Multiple ChoicePlease save your changes before editing any questions.
Which elements are metals?
*You can select more than one answer.
Cd
Cu
Br
P
- Multiple ChoicePlease save your changes before editing any questions.
Which elements are nonmetals?
Br
Cd
Cu
P
- Multiple ChoicePlease save your changes before editing any questions.
In which group of the Periodic Table of the Elements are the noble gases located?
Group 1
Group 2
Group 17
Group 18
- Multiple ChoicePlease save your changes before editing any questions.
The diagram below shows the arrangement of atoms and the chemical composition of a water molecule. The table shows common elements and their chemical symbols. What two elements make up the water molecule?
Helium and Oxygen
Calcium and Hydrogen
Hydrogen and Oxygen
Carbon and Oxygen
- Multiple ChoicePlease save your changes before editing any questions.
How many grams of the solid solute will dissolve in 100 grams of water at 25°C?
30 g
40 g
38 g
31 g
- Multiple ChoicePlease save your changes before editing any questions.
Describe the relationship between water temperature and the solubility of the gaseous solute from 0°C to 15°C.
As the temperature increases, the solubility increases
As the temperature increases, the solubility decreases
As the temperature increases, the solubility remains constant
- Multiple ChoicePlease save your changes before editing any questions.
Select the ways to increase the rate (speed) at which a solid solute dissolves in 100 grams of water.
*You may select more than one answer
heat it (increase heat)
shake it, stir it (increase motion)
freeze it (decrease heat)
crush it (increase surface area)
let it settle (decrease motion)
- Multiple ChoicePlease save your changes before editing any questions.
Elements that have some characteristics of metals and some characteristic of non-metals are called:
noble gases
elements
metalloids
transition metals
- Multiple ChoicePlease save your changes before editing any questions.
The atomic number of an atom is determined by the number of
protons
electrons
neutrons
valence electrons
- Multiple ChoicePlease save your changes before editing any questions.
The modern periodic table is organized according to
chemical symbols
atomic number
atomic weight
the alphabet
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following elements is the best conductor of electricity?
Carbon (C)
Sulfur (S)
Oxygen (O)
Copper (Cu)
- Multiple ChoicePlease save your changes before editing any questions.
Which element from this portion of the table chemically reacts in a way similar to the way the element chlorine (Cl) reacts?
Si
Xe
O
I
- Multiple ChoicePlease save your changes before editing any questions.
Which element is classified as a noble gas?
Sulfur (S)
Argon (Ar)
Oxygen (O)
Nitrogen (N)
- Multiple ChoicePlease save your changes before editing any questions.
Because copper is a metal, it is
liquid at room temperature
nonreactive with our substances
a poor conductor of electricity
a good conductor of heat
- Multiple ChoicePlease save your changes before editing any questions.
These particles are located in the nucleus of an atom:
electrons and neutrons
protons and electrons
neutrons, protons, and electrons
neutrons and protons