Chem U03 Review: Atoms, Isotopes, & Decay

Which of the following is best used to tell elements apart?

• Atomic Number

• Mass Number

• Average Atomic Mass

Which of the following is best used to tell isotopes of a given element apart?

• Atomic Number

• Mass Number

• Average Atomic Mass

How many protons does P-30 have?

• 30
• 16
• 12
• 15

How many neutrons would Fe-56 have?

• 56
• 26
• 30
• 33

What element has 42 protons?

• Ca
• Mo
• Zr
• Po

Tags

NGSS.HS-PS1-1

Which of the following could have 14 neutrons?

• Al-27
• Si-29
• Mg-25
• Na-22

Tags

NGSS.MS-PS1-1

How many protons does Pb-209 have?

• 127
• 209
• 82
• 291

Tags

NGSS.HS-PS1-1

Which of the following is the most abundant isotope of carbon?

• C-12

• C-13

• C-14

What is the atomic number of this isotope of copper, Cu?

What is the mass number of an atom of gold with 117 neutrons?

• 117
• 196
• 196.97
• 197