Unuy vulence electrons
2. as you move from left to right in the groups,
a. add rings/energy levels
b. take away rings/energy levels
c. add valence electrons (up to 8)
d. take away valence electrons
an atom has an atomis number of 18 and an at

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

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Frequency of electromagnetic waves that a radio station is assigned is called