3.00 Pretest (BrainPop "Atoms")

What is the significance of the periodic table of elements? Choose the best answer.

• It lists all the different metals known to humans

• It predicts and lists all the chemical elements in the universe

• It explains where different atoms can be found

• It proves that atoms are the building blocks of matter

Tags

NGSS.MS-PS1-1

What do electrons in the same shell have in common?

• They have the same amount of energy

• They are all positively charged

• They are all made up of atoms

• They all have neutral charges

Which of the following is an example of a subatomic particle?

• Carbon

• Oxygen

• Electron

• Hydrogen

Tags

NGSS.MS-PS1-1

What might happen if the strong force didn't exist?

• Electrons would have positive charges

• Atomic nuclei would fly apart

• It would be more difficult to split atoms

• Neutrons would not exist

Tags

NGSS.HS-PS1-8

What two types of particles exist within an atomic nucleus?

• Protons and neutrons

• Neutrons and electrons

• Protons and neutrinos

• Positrons and neutrons

Tags

NGSS.MS-PS1-1

Oxygen has an atomic number of 8. What can you conclude from this fact?

• An atom of oxygen weighs 8 grams.

• An atom of oxygen has 4 protons and 4 electrons.

• An atom of oxygen has 8 positrons.

• An atom of oxygen has 8 protons.

Tags

NGSS.MS-PS1-1

The word "atom" comes from a Greek word for "indivisible." In what way are atoms indivisible?

• They cannot be separated once they've bonded with other atoms

• They cannot be broken apart without losing their chemical properties

• They cannot form bonds with other atoms

• They cannot gain or lose electrons

Tags

NGSS.MS-PS1-1

How are molecules different from atoms?

• They consist of several atoms bonded together.

• They do not contain neutrons.

• They do not have nuclei.

• Their particles do not have electrical charges.

Tags

NGSS.MS-PS1-1

What can you conclude from the fact that electrons orbit far away from atomic nuclei?

• Electrons are extremely small

• Atoms are comprised mostly of empty space

• Protons have a positive charge

• Atoms consist of subatomic particles

Tags

NGSS.MS-PS1-1

In the following diagram, what does the number 12 represent?

• An atomic number

• A number of electrons

• An atomic mass

• A chemical symbol