16. Dr. Garcia is a geologist from Peru, and Dr. Ferreira is a geologist from Brazil. They are comparing rocks from their areas for their research and have some information about them. The information is as follows: Rock A formed from small pieces of rock.
Rock B formed from liquid rock in a different place.
Rocks A and B formed at about the same time.
As they work on their study, they need to answer the question: Are Rocks A and B the same or different types of rock?

The rocks are

they are both synthetic elements

explanation:

d

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally