2. Imagine that you separate the gas into two equal containers half the size of the original container. Compare the internal energy of the gas in each container with the energy before the gas was split. Compare the temperatures of the gas. What is the difference between the internal energy of the ideal gas and its temperature

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

"the periodic table is arranged in order of atomic number."

i think   the answer is c hope i'm right

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.