Wk. 8 Benchmark Review

8th Grade

Calculate the number of protons, neutrons, & electrons and draw a Bohr

model for the following elementChlorine (Cl)

Protons =

Neutrons=

Electrons=

Bohr Model

Calculate the number of protons, neutrons, & electrons and draw a Bohr

model for the following elementSodium (Na)

Protons=

Neutrons=

Electrons=

Bohr Model

Calculate the number of protons, neutrons, & electrons and draw a Bohr

model for the following elementPhosphorus (P)

Protons=

Neutrons=

Electrons=

Bohr Model

Calculate the number of protons, neutrons, & electrons and draw a Bohr

model for the following elementArgon (Ar)

Protons=

Neutrons=

Electrons=

Bohr Model

Calculate the number of protons, neutrons, & electrons and draw a Bohr

model for the following elementBeryllium (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 13-A. Different isotopes

B. Oxidation States

C. Electron energy levels

D. Protons in its nucleus

13

AlAluminum26.981

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 -