What period is the atom in? What group is the atom in?
What is the name of this atom?
What other atom would have similar properties
to the atom?
Would this atom be malleable or brittle?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?