EOC Review: SPS1, 2, 4, 7, 8 (45 min)

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

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

• nucleus 
• electron cloud
• core 
• center 

Tags

NGSS.HS-PS1-8

An atom's mass number equals the number of...

• protons plus the number of electrons
• protons plus the number of neutrons
• protons
• neutrons

Atoms have no electric charge because they...

• have an equal number of charged and non charged particles
• have neutrons in their nuclei
• have an equal number of electrons and protons
• have an equal number of neutrons and protons

Matter always has mass.

• true
• false

What is the smallest?

• worm
• molecule
• galaxy
• atom

Tags

NGSS.MS-PS1-1

Which particle has a similar mass to a proton?

• Electron
• Neutron
• Photon
• Marble

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

The atomic number tells you what?  READ THE ANSWERS CAREFULLY

• only the number of electrons
•  only the number of protons
• only the number of neutrons
• the number of both electrons and protons in an atom.