An alloy of sodium and potassium is used as a coolant due to its A. high thermal conductivity
B. physical state
C. high reactivity
D. all except c​

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?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

+= + + balance the equation on coefficients, ex. 1,1,1