Answer:
Solid
Liquids and gas can freely go where they want to
Answer:
I believe it would be 30, 100, and 1. You count them, and they're significant figures. The decimals are an estimate and cannot be measure exactly. That is what I've learned, not sure what you're learning but hopefully it helps...
Explanation:
Basic explanation is when you count, that's an exact count. You're not estimating. That's real. But for measuring something, you wouldn't have a precise answer because it could go on forever (like Pi)... this is just what i'm assuming.
Valency is the number of electrons present in the outermost shell.
Answer:
Explanation:
They are the molecules that are formed when four atoms chemically bond together.
Answer:
Hello
The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom.
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<em>Source: https://socratic.org/questions/what-does-the-mass-number-tell-us</em>
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Best regards
