If 450.0 mL of a 0.500 M solution is mixed with 200.0 mL of water, what is the molarity of the new solution?
A. 0.346 M
B. 0.625 M
C. 1. 86 M
D. 2.50 M

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

a

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.