Not sure what the question is, but a standard sodium atom has 11 protons, 11 electrons, and 12 neutrons with an atomic mass of 23. A sodium atom with a mass number of 24 probably has 13 neutrons.
Answer:
Air is a mixture, and the image shows that it is composed of different amounts of the same several pure substances.
Explanation:
water, O2, and carbon dioxide (all mixtures) are made of pure substances like hydrogen, oxygen, and carbon.
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Gas takes the shape and volume of its container because the particles in a gas are loosely packed, so that it doesn't have a defined shape or volume. This is why it takes the shape/ volume of it's container.
A neutron is the opposite