What is the the best estimate for the density of sphere A? 2.7 g/mL
1.4 g/mL
1.7 g/mL
1.3 g/mL

14 days is the half-life of phosphorus-32

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

answer: i dont know the answer but this might

explanation:

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