Answer: chemical
Explanation: whenever heat is applied, it indicates a chemical change
They have hydrogens numbers wrong its 1.008 not 1.01
The percentage of CO2 increased 48 percent. Hope this helped!
Elements in the same group on the periodic table have the same number of valence electrons. The "groups" are the column (or rows). groups are vertically and periods are horizontally.
Answer:
The non-metals or non-metallic elements; hydrogen (H), carbon (C), nitrogen (N), oxygen (O), phosphorus (P), sulphur (sulfer) (S), selenium (Se), (Uuo may belong here) and the noble gases form a relatively small group with a step like pattern towards the left-hand side of the periodic table (hydrogen being the odd one .