What type of reaction is shown here? 2 NO2-202 + N2
O Double replacement
O Combustion
O Decomposition
O Single replacement
Synthesis

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?

Name the element in group 17, period 2. (periodic table)

What is the value of keq for the reaction expressed in scientific notation?