What did antoine lavoisier’s experiments demonstrate

Mass is neither lost nor gained during a chemical change.

Explanation:

Antoine Lavoisier’s Law of Conservation of Mass:

'In a chemical reaction the mass can neither be created and nor be destroyed'.

In a chemical reaction the mass of reactants is equal to the mass of products which means that the mass remain conserved.

For Example: In a chemical reaction:

Mass of reactants = Mass of products

Mass of hydrogen molecule + mass of oxygen molecule = Mass of water

From this we can see that the mass remains conserved in the chemical reaction.

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.