What is the name for the positive subatomic particles in an atom?

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

What’s the percent by mass of carbon in c10h14n2

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)