CHM Unit 3 Test atomic structure

How many neutrons in C-14?

• 6
• 7
• 14
• 8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and mass number

Calculate the average atomic mass of element X when 34% of element X exists as X-272 and the remainder exists as X-274.

• 185.64amu
• 273.32amu
• 272.68amu
• 27.33amu

 Copper occurs naturally as Cu-63 and Cu-65. Which isotope is more abundant?

• Cu-63
• Cu-65

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

The atomic number tells you what?

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

What period and group is Silver (Ag)? 

• Period 2, Group 1
• Period 3, Group 16
• Period 5, Group 11
• Period 2, 14