How do you use the periodic table to recall the ionic charge of an alkali metal, and alkaline earth metal, or aluminum

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere