Mastery Assess It_1 Chemistry - 0190-220061.501 / Week 2 (Aug 31-Sept 4) / Defining Matter / Day 5: Unit 1 Test
1. Based on the data in the graph below, how many sunspots were recorded in 1975?
Sunspots Per Year
180
160
140
120
100
Number of Sunspots
80
60
40
w
20
0
1965
1970
1975
1980
1985
1990
1995
2000
2005
Year

Heating it up with cause a quicker reaction time

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.

The answer is  a: x-rays—2 and ultraviolet rays—3.  hope i !