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mojhsa [17]
3 years ago
9

I need help with Number 61 please

Chemistry
1 answer:
a_sh-v [17]3 years ago
5 0

Answer:

40 (superscript) is the mass number aka atomic mass, and 19 (subscript) is the atomic number aka number of protons and electrons.

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Arrange the elements in order of increasing atomic radius. Use the periodic table to help you.
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