Which are types of star systems?
dim stars
binary stars
i open clusters
wobbling stars
globular clusters

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.