17. The atoms in Group A are different from the atoms in Group B because only the atoms in Group A have a. their outer energy levels filled with electrons
b. three energy levels of electrons
c. arrangements typical of metals
d. arrangements typical of nonmetals

there are no atoms

1 is a answer of a question

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation:

a. carbon monoxide from car exhaust

b.particulate matter, such as soot

c.water vapor from a factory smokestack

d.acid rain

these are the answer choices im on that question right now