Do you notice a pattern in the charge for elements in each group? Explain. (Hint: relate to number of valence electrons and the octet rule)

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %