<span>The box with no lightbulb is the control group.
The others are treatments. The purpose of a control group is used to increase the validity of the experiment by testing
the independent variable to check that it
does not influence the results. </span>
Answer: Uranium is an inert.
<span>His periodic table provided everyone with the idea that elements should be arranged by the increasing order of their fundamental properties. It was later discovered that atomic number IS the fundamental property</span>
Complete combustion
2C2H6 + 7O2 = 6H2O + 4CO2
Because their valence shell have stable electrons so they can't gain or loose electrons.
in ionic bonds the elements should gain or loose electrons
