3.1 Distinguishing Among Atoms

Multiple Choice

What is the atomic # of iron?

• 55

• 56

• 26

• 2

Multiple Choice

How many protons does krypton have?

• 84

• 36

• 48

• 8

Multiple Choice

How many electrons does oxygen have?

• 8

• 16

• 2

• 15

Multiple Choice

How many neutrons does lithium have?

• 3

• 4

• 6

• 7

Multiple Choice

How many neutrons are in magnesium?

• 12

• 24

• 25

• 36

Multiple Choice

How many neutrons does beryllium have?

• 4

• 5

• 9

• 13

Multiple Choice

How many electrons does helium have?

• 2

• 4

• 6

• 8

Multiple Choice

What is the mass number of this atom?

• 1
• 3
• 4
• 7

Multiple Choice

These three isotopes of carbon have different -

• Atomic numbers

• Mass numbers

• Numbers of protons

• Symbols

Multiple Choice

What is the name of the pictured isotope?

• Chlorine-Schmorine
• Chlorine-17
• Chlorine-35
• Chlorine-18

Multiple Choice

How many protons are in the following atom?

• 82

• 125

• 207

• 189

Multiple Choice

How many neutrons are in the following atom?

• 47

• 61

• 108

• 155

Multiple Choice

How would you write the isotope name from this nuclide symbol?

• Sodium-23

• Sodium-11

• Sodium-12

• Sodium-22