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Hafnium: atomic number

: atomic number 15
: atomic number 45
osmium: atomic number
magnesium: atomic number

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Answer:

idk ether

Step-by-step explanation:

User James Franco
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Answer:

hafnium: atomic number 72

Phosphorus :Atomic number 15

Rhodium :Atomic number 45

Osmium: atomic number = 76

Magnesium: atomic number = 12

User Anthonyvd
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