Which formula contains a metal and a nonmetal? SO2 MgO CO H2O

Explanation:

Metals are red, nonmetals are blue, and metalloids are yellow in the attached file.

Using this table, you can see that Mg is a metal and O is a nonmetal, which fits the question criteria.

Hope this helps!

Distance and velocity graph

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