Unit 1 - Post-Test

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 

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

• 14
• 7
• 15
• 18

The particles that are found in the nucleus of an atom are _____.

• Neutrons and electrons
• Electrons only
• Protons and neutrons
• Protons and electrons

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

What are the 3 particles that make-up the atom?

• Protons, neutrons, and isotopes
• Neutrons, isotopes, and electrons
• Positives, negatives, and electrons
• Protons, neutrons, and electrons

What does the 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

What is the atomic mass of "F"

• 9
• 18
• 17
• 19

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

As you move down a group, atomic radius increases because - 

• you add more and more neutrons
• you add more and more protons
• you add more and more shells (energy levels)
• you add more atomic mass