Name two elements that would have properties similar to beryllium, with atomic weights higher than 130.

two elements would be barium and radium.

Explanation:

in the periodic table, elements of the same group are characterized by having the same similar properties.

So, first we will check the elements that lie within the same group as beryllium  and then we will attempt to choose the elements with atomic mass higher than 130.

So, elements in the same group as beryllium are: magnesium, calcium, strontium, barium and radium.

Among these elements, we will find that:

radium has atomic mass of 226 amu

barium has atomic mass of 137.327 amu

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.