Jessica is measuring the amount of hydropower in a sustainable home. the first reading is 30 kilowatts (kw) and the second reading is 500 watts (w). what is the total amount of energy measured?     a30.5 kw  b35,000 w  c300,500 w  d305 kw

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?