An atom has the following electron configuration. 1s^22s^22p^63s^23p^4 How many valence electrons does this atom have? 2
4
6
12​

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.

Type the correct answer in each box.balance the chemical equation.__ n203 ➡️ __ n2 +__ o2