Over the past 30 years, the average temperature in a city during the month of March was 66 50F Temperatures in 2020 show the average temperature in March was 7100F What conclusion can be made aBout this change HELPPP PLSSS

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.

there are two significant figures.

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