What is helium? Atoms, elements, and chemistry
Diagram of a helium atom Helium is a very simple atom. Helium is a simple atom. The nucleus of a helium atom has two protons and two neutrons. Around the nucleus, [...]
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06, 2017
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06, 2017
What is heat? Simple science – Chemistry
What is heat? A big campfire throws some serious heat Definition of heat When molecules of any kind of atoms get more energy in them than they had before, they [...]
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06, 2017
What is gold? Chemical elements
Gold jewelry shaped like bees, from Bronze Age Greece Gold is a much heavier atom than iron, with 79 protons and 79 electrons in each atom. Gold is too heavy for [...]
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06, 2017
What are electrons? An electron is a sub-atomic particle
What are electrons? Lithium, cobalt, and oxygen atoms (as in a lithium-ion battery), seen under an electron microscope from Berkeley Labs What is an electron? An electron is a tiny [...]
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06, 2017
Dominoes – Uranium chain reaction – Chemisty
You can't really do an experiment using uranium, because it is radioactive and if you experimented with uranium it would make you sick or kill you. So to see how a chain [...]
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06, 2017
Tin cans – Chemistry projects – Science
Steel soup can To see how tin keeps a steel can from rusting, get an empty can. A can from canned green beans or canned peaches or something like that would [...]
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06, 2017
Sulphur, eggs, and matches – Chemistry project
A hard-boiled egg To check out some sulphur for yourself, take an ordinary chicken egg and hard-boil it for about twelve minutes. Then break it open and smell the yellow [...]
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06, 2017
Strong nuclear force project – Chemistry
You can't see an atom, so you can't see how its protons clump together to make the nucleus. But you can see a similar effect when the force of magnetism (a kind [...]
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06, 2017
Steam kettles – Chemistry project
Steam escaping from a tea kettle To see water turning into steam, boil some water in a pot. When it boils, do you see the steam? What does the steam [...]
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06, 2017
Sodium explosions – Science project – Chemistry
Sodium exploding on contact with water You really shouldn't experiment with sodium at home, because it blows up. When sodium touches water, it mixes with the water so that two [...]
