The mass of an electron is A) equal to the mass of a proton B) greater than the mass of a proton C) equal to the mass of a neutron D) less than the mass of a neutron

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

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?