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Help me PLEASE, it's physical science D:

Help me PLEASE, it's physical science D:
asked 159k views
4 votes
Help me PLEASE, it's physical science D:

Help me PLEASE, it's physical science D:-example-1
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User Phb
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7.7k points

1 Answer

3 votes

Answer:

90

Step-by-step explanation:

The bottom number on the element is the number of protons and the top number is the total of the protons + neutrons

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User Maurice Perry
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