A chemistry student is experimentally determining the boiling point of bromine. The experimental melting points are listed below from a

to e. Which one should he discard so that he can say his data is

precise?

a 59.0 °C

b 58.8 °C

C 58.5 °C

d 59,1°C

e 56.3 °

Option (e) should be discarded.

Explanation:

The given set of data is said to be precise if the values are close to each other. In this problem, a chemistry student is experimentally determining the boiling point  of bromine.

In this case, all values are close to each other but option (e) i.e. 56.3° should be discarded to make his data precise.

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