The astronaut then measures the abundance of strontium on the new planet, obtaining the following results:

isotope abundance
(%) mass
(amu)
86sr 9.46 85.91

87sr

7.00 86.91
88sr 83.54 87.91

what is the atomic mass of strontium for this planet?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane