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In space we feel weightlessness because the earth's gravity has less effect on us. Why do we not see the effect of the gravitational...
Why is hydrogen's atomic number 1?
Does sodium have any isotopes? Is it radioactive?
What is a material with a freezing point above 0 degrees Celsius?
When studying elements I noticed that there is a boiling point and melting point. What are they?
I am not clear on what a molecule is. If water is a molecule, is it also a compound because the hydrogen and oxygen have been chemically...
When was the nucleus discovered?
Why aren't Chlorine-35 and Chlorine-37 two different elements?
What is an alpha particle?
How cold is liquid nitrogen?
If you have 11 protons and 12 neutrons this is an atom of what element?
How are electrons placed in shells around the nucleus?
Why do the electron shells begin being named with K, L, M, N, and not with A, B, C?
Is there an atom that does not have neutrons?
Is vacuum matter? What are ten things that are not matter?
What would happen to the atomic number and the electric charge of an atom if two neutrons escaped the nucleus?
What is the sun made out of?
What are the exact relative masses of protons, neutrons and electrons?
How many times bigger is a proton than an electron?
How do you determine how many protons, neutrons, and electrons are in an atom?
What is air made of?
Will scientists ever find elements smaller than hydrogen?
What are the freezing and melting points of krypton?
What is the charge of an up quark and the charge of a down quark? How many quarks make up a proton and a neutron?
Does gravity affect atoms?
Is krypton dangerous?
Can you crush atoms?
What makes Hassium an element if it has no uses except basic scientific research?
What is the simplest way of explaining what an atom, element, compound and mixture are?
How do you prove air is matter?
What's the difference between Hydrogen, Nitrogen, Oxygen, Neon, Copper, Gold and Magnesium?
How many quarks are in a proton? How many quarks are in a neutron?
Can you use light to push light?
How do you separate tungsten from its ore?
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