Isotopes and RAM

What is an isotope?​ (a)  

• Same atomic number, different mass number.
• Same mass number, different atomic number.

How many neutrons are in carbon 12?​ (a)   ​

• 6
• 12

Select an option.

• A

• B

• C

Select an option.

• 3950

• 3550

• 3170

Select an option.

• 237.95

• 23795.48

• 237.98

• 23797.98