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Refer to a periodic table and tell how many helium atoms (He) would be needed to get close to the same mass as an average oxygen atom (O). a. six b. four C. twelve d. one-fourth
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Refer to a periodic table and tell how many helium atoms (He) would be needed to

get close to the same mass as an average oxygen atom (O).
a. six
b. four
C. twelve
d. one-fourth

User Brad Barrow
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about 4. the weight of He is about 4 amus and the weight of O is about 16 amus, so you would need 4 He atoms to get close to the same mass as an O atom. i hope this helps
User Johannes Titz
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