Why do elements in a group on the periodic table have similar chemical properties?
a.
same number of outermost electrons
b.
same number of protons
c.
similar atomic masses
d.
similar atomic numbers

In which phase(s) do the molecules take the shape of the container?

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures