Transcript Wk. 8 Benchmark Review

Wk. 8 Benchmark Review
8th Grade
Calculate the number of protons,
neutrons, & electrons and draw a Bohr
model for the following element
Chlorine (Cl)
Protons =
Neutrons=
Electrons=
Bohr Model
Calculate the number of protons,
neutrons, & electrons and draw a Bohr
model for the following element
Sodium (Na)
Protons=
Neutrons=
Electrons=
Bohr Model
Calculate the number of protons,
neutrons, & electrons and draw a Bohr
model for the following element
Phosphorus (P)
Protons=
Neutrons=
Electrons=
Bohr Model
Calculate the number of protons,
neutrons, & electrons and draw a Bohr
model for the following element
Argon (Ar)
Protons=
Neutrons=
Electrons=
Bohr Model
Calculate the number of protons,
neutrons, & electrons and draw a Bohr
model for the following element
Beryllium (Be)
Protons=
Neutrons=
Electrons=
Bohr Model
A student walks 2 km in 30 minutes.
What is the student’s average
speed?
A car traveled at a constant speed of 15 m/s for
2 minutes. Which of the following graphs best
represents the car’s motion during this 5 minute
period?
4 students raced toy cars on a track. The
mass and acceleration of each car is
recorded in the table below. Which toy
car had the greatest applied force?
Which of the following best
describes an electron?
A. It has no charge and about the same
mass as a proton
B. It has a negative charge and much less
mass than a proton
C. It has a positive charge and much more
mass than a neutron
D. It has a negative charge and about the
same mass as a neutron
A model of an atom is shown below. An
atom of which element is represented by
this model?
A. Boron (B)
B. Carbon (C)
C. Neon (Ne)
D. Sodium (Na)
For an investigation, a student measures the
speed of a cart as it rolls down a ramp. The
student then records data in the table below.
Which of these best explains the students data?
A. The speed of the cart decreases as the cart rolls down the
ramp because of friction between the cart and the ramp
B. The speed of the cart increases as the cart rolls down the
ramp because the force acting on the cart is greater than the
force of gravity
C. The speed of the cart increases as the cart rolls down the
ramp because the forces acting on the cart are unbalanced
D. The speed of the cart decreases as the cart rolls down the
ramp because the forces acting on the cart are balanced
A researcher wants to experiment with an
element that reacts like Phosphorus (P) but has
a greater atomic mass. Which element should
the researcher select for this experiment?
A. Nitrogen (N)
B. Sulfur (S)
C. Arsenic (As)
D. Silicon (Si)
The 3 vehicles below are all traveling at a
speed of 15m/s, but only the pickup truck
has a changing velocity. Why?
A can accelerate faster than the other two vehicles
B is traveling in the opposite direction from the
other two vehicles
C is traveling on a curve in the road
D needs a large amount of force to move
Which of the following graphs
displays the data of an object that is
accelerating?
A ball is rolling across a field with a force
of 20 N. If the force of friction from the
field is 3.7 N, what would be the net force
of the ball?
What are the vertical columns on
a periodic table called?
What 2 subatomic particles go
inside the nucleus of an atom?
According to Newton’s Law of Inertia,
which of the following objects will
change its motion?
A A bike rider on a smooth and level road,
pedaling at a constant rate
B A train pulling on another train, each with the
same amount of force
C A chair sitting on the floor with balanced forces
acting in opposite directions
D A ball rolling across the floor with friction acting
in the opposite direction
What are the horizontal lines on
a periodic table called?
The table provides information of 4
different elements. Which element
has 6 protons?
The atomic number of Aluminum is
13. This means that Aluminum has 13A. Different isotopes
B. Oxidation States
C. Electron energy levels
D. Protons in its nucleus
13
Al
Aluminum
26.981
Examine the table provided.
Which of the objects is producing the greatest
force?
What property uniquely identifies
each element?
An elements reactivity and other
chemical properties is
determined by the number of…..
A. Isotopes it has
B. Oxidation states
C. Orbitals in atoms
D. Valence electrons
The graph shows the distance traveled by a
ball over a certain amount of time. According to
the graph, between 2 and 4 seconds the ball
was -
A. Constant speed
B. Increasing speed
C. Changing direction
D. Remaining at rest
Molybdenum has an atomic
number of 42. This means that
Moldybdenum A. Has a freezing point of 42 degrees
B. Belongs to group 42 on periodic table
C. Can from 42 bonds
D. Contains 42 bonds in its nucleus
If a car is moving on a highway at 70
kilometers per hour, going south, and
then turns to travel 70 kilometers per
hour, going east, what happens to its
speed and velocity?
A Speed - changing, Velocity - constant
B Speed - constant, Velocity - changing
C Speed - constant, Velocity - constant
D Speed - changing, Velocity - changing
The nucleus of the atom contains 8 protons and
9 neutrons. The atom is electrically neutral. How
many electrons does this atom have?
What are the circles in a Bohr
model called?
If an atom has 17 protons, 18
neutrons, and 17 electrons, what is
the mass of this atom?
For an object to remain at rest,
which of the following must be
true?
A. The forces on it are balanced.
B There is no friction.
C Gravity does not act on it.
D The object has no mass.
Which of the following examples
accurately describes an object that is
accelerating?
A A ball sitting motionless on the floor
B An airplane moving at 500 kilometers per
hour
C A car slows down to turn a sharp corner
D A bike moving backward at 3 meters per
second
The following data describes the motion of a car over a
three minute period.
Which of the following statements regarding the car’s
motion is true?
A The velocity of the car changed, but not the speed.
B The speed of the car changed, but not the velocity.
C The velocity and the speed of the car changed.
D The velocity and the speed of the car stayed the same.
What are valence electrons?
The illustration provided shows two boys
pulling on opposite ends of a rope with
different amounts of force.
What is the net force on the rope?
Provided is a diagram showing forces on a
box.
Given the forces being applied from the left
and right sides of the box, the box will -