5. A mld-ooean ridge exists in the middle of the Atlantic Ocean. This is labeled on your map with the zig- zap Ine. Based on the ages of oceanic rocks around the mid-ocean ridge, what do you think is happening
here?

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

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

C) electrons encircling a nucleus with neutrons and protons

Dsolubility let me know if you have any other questions for chemistry