1 How many valance electrons are in the atom of potassium (K) below?
K

A. 2
B. 8
C. 1
D. 4

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

How have the greenhouse gasses increased from the year 2000 to 2018

What is the lowest number energy level where a d sublevel is found