Billy is a student conducting an experiment on 4 unknown compounds. Using knowledge about the properties of ionic and covalent compounds, he must determine what these 4 compounds are.

 

Properties of Ionic and Covalent Compounds
Substance Phase at Room Temp Melting point (°C) Conducts electricity? Soluble in water?
Compound A solid 808 yes yes
Compound B solid 1610 no no
Compound C gas -56 no yes
Compound D solid 680 yes yes
 

Question 1
Based on the data table, what compound is Compound A?
Responses
A CO2CO 2
B H2H 2
C NaClNaCl
D SiO2