A) 8
B) 15
C) 22
D) 78
Answer: D
Explanation: Platinum has atomic number 78. That means each platinum atom has 78 protons in its nucleus.
A) 8
B) 15
C) 22
D) 78
Answer: D
Explanation: Platinum has atomic number 78. That means each platinum atom has 78 protons in its nucleus.
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