Atoms, Elements, and the Periodic Table

What is the smallest piece of matter?

• atom

• molecule

• proton

• neutron

What is the atomic number of an element?

• number of electrons

• number of protons

• number of neutrons

• number of protons and neutrons

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

How does the size of a proton compare to the size of a neutron?

• larger
• smaller
• equal

These particles orbit around the nucleus of an atom.  What are they called?

• electrons
• protons
• neutrons
• photons

Tags

NGSS.MS-PS1-1

An atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

The number at the top of each square on the periodic table is the ...

• atomic number
• atomic mass
• Chemical Symbol
• Element Name

Tags

NGSS.MS-PS1-1

What is the atomic number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of protons and electrons