4. Write conversion factors for each equality. a. 1 m3 = 1 000 000 cm3
b. 1 in. = 2.54 cm
c. 1 ug = 0.000 001 g
d. 1 Mm = 1 000 000 m

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

State one important difference between a physical change and a chemical change?