Step 8: Measuring the Volume of Air Near 80°C Use tongs to put the beaker (with tube and
thermometer) on the hot plate.

Temperature of gas: ___ C

Height of the column of gas: ___ cm

1-82 2-7.4 3-355 4-.93

Explanation:

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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.