he showed that oxygen is required to burn.
Answer:
Because it contains only two elements.
Explanation:
A binary compound is a compound made up of only two elements. Barium chloride contains:
1. Barium.
2. Chlorine.
Since Barium chloride contains only two elements, it is therefore a binary compound.
Answer:
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons
D is the correct answer
every other option contains an element
According to Charles' Law the volume of an ideal gas is directly proportional to its absolute temperature in Kelvin keeping the pressure constant.
V∝ T, P is constant
where V, T and P are volume, temperature and pressure
= 
where V₁, T₁, V₂ and T₂ are initial volume, initial temperature, final volume and final temperature.