PS 4.2

What is the atomic mass of Neon?

• 10
• 30.18
• 10.18
• 20.18

What is the atomic number for an element with 41 neutrons and a mass number of 80?

• 39
• 41
• 80
• 121

How many protons are present in phosphorus-31

• 15
• 16
• 31
• 46

Found in the nucleus of the atom

• electrons only
• protons only
• neutrons and protons
• neutrons and electrons

^{What does the 6 represent above the C}

• Symbol 
• Name 
• Mass Number 
• Atomic Number 

Atomic mass - Atomic Number =

• protons
• neutrons
• electrons
• Average Mass

An element is defined by its number of 

• protons
• electrons
• neutrons
• protons + electrons

Which of the subatomic particles is the lightest

• all have the same mass
• protons 
• neutrons 
• 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.

How many protons are in C-14?

• 14
• 6
• 8
• 7