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How many protons are in an element with an atomic number of 8 and a mass number of 18? a. 8 b. 10 c. 18 d. 3
asked
Jan 23, 2017
Mathematics
high-school
2
answers
0
votes
179k
views
What is the value of the digit 4 in the number 84230
asked
Dec 15, 2016
Mathematics
middle-school
2
answers
2
votes
218k
views
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