Imagine that a severe hurricane moves along the
Texas coast in the Gulf of
Mexico. Describe the potential changes to the beachfront ecosystem, including changes to the land formations and organisms living in that area.

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answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

1 is the answer to this problem

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8