Milestone Review

Each inner energy level of an atom has a maximum number of ____ it can hold. 

• electrons

• neutrons 

• quarks

• protons

Horizontal rows of the periodic table are called ____. 

• groups

• families

• clusters 

• periods

Atoms of the same element with different numbers of neutrons are called ____.

• isotopes

• radioactive elements

• metalloids

• metals

Elements that are gases, are brittle, and are poor conductors at room temperature are ____.

• isotopes

• nonmetals

• metalloids

• metals 

Explain why the noble gases are stable.  

• Complete outer Shell

• They are better than you

• They are royalty

• Better electrons

Compare the masses of protons, electrons, and neutrons.

• Protons and neutrons are the same ,electrons have a smaller mass

• electrons are heaver

• protons are lighter

• neutrons are lighter

A substance with a mass of 10 g is heated to produce two new substances. The mass of the first new substance is 9.3 g and the mass of the second new substance is 0.7 g. Which of the following is best demonstrated by this example?

• heat transfer

• physical change

• law of conservation of mass

• law of conservation of energy

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following best describes the velocity of an object?

• 30 m/s

• 30 m/s east

• 30 m/s²

• 30 m

Tags

NGSS.MS-PS3-1

What is the difference between the velocity and speed of an object?

• Velocity is the change in distance over time, while speed is the change in velocity over time.

• Velocity has a direction associated with it, while speed has no specific direction.

• Velocity is the change in speed over time, while speed is the change in distance over time.

• Velocity has no direction associated with it, while speed has a specific direction.

The diagram shows a graduated cylinder containing water. From which position will the most accurate measure of the volume of water be made?

• Position 1

• Position 2

• Position 3

• Position 4