63/29 Cu (copper-63)
65/29 Cu (copper-65)
24/12 Mg (magnesium 24)
25/12 Mg (magnesium 25)
26/12 Mg (magnesium 26)
6/3 Li (lithium 6)
7/3 Li (lithium 7)
The top number is the mass number and you find that by adding the number of neutrons and atomic number
The bottom number is the atomic number and it’s the number or protons
Answer: (B)
Explanation: Decreases the number of bases in the sequence.
I would say D. Let me know if i am wrong.
It can be an element or a compound
Answer:
I think the density is 64g/cm^3
i did 960 divided by 15 to get 64.
