What is sulphur? Atoms, elements, chemistry
Diagram of a sulphur atom Sulphur atoms fall near the middle of the scale: they are heavier than silicon but lighter than iron. Every atom of sulphur has 16 protons [...]
2
06, 2017
2
06, 2017
What is the strong nuclear force? Atoms and Physics
Diagram of an iron atom The protons inside the nucleus of an atom all have a positive electrical charge, so they push away from each other. But the strong nuclear [...]
2
06, 2017
Steam and water – Simple Science – Chemistry
Swimming in natural hot springs in Iceland When water gets very hot, it boils and turns into steam. This happens at 212 degrees Fahrenheit or 100 degrees Celsius. The water [...]
2
06, 2017
What is sodium? Atoms, elements, chemistry
Diagram of a sodium atom Sodium is an atom that has 11 protons and 12 neutrons in its nucleus and 11 electrons circling around its nucleus. Like other light atoms [...]
2
06, 2017
What is silicon? Atoms, elements, chemistry
Diagram of a silicon atom When a red giant star is getting older and runs out of helium fuel, it starts to convert the oxygen atoms in the star into silicon [...]
2
06, 2017
What is a proton? Atoms and Chemistry
Autzen Stadium, in Eugene Oregon, seats 54,000 people A proton is a tiny particle, smaller than an atom. Protons are too small to see, even with an electron microscope, but [...]
2
06, 2017
What is phosphorus? Atoms, elements, chemistry
Diagram of a phosphorus atom Phosphorus atoms have fifteen protons and sixteen neutrons, so they're just a little lighter than sulphur atoms, in the middle of the range for atoms. [...]
2
06, 2017
What is nitrogen? Atoms, Elements, Chemistry
Diagram of a nitrogen atom Inside a red giant star, the star smashes lighter atoms together. Smashing atoms gets the star energy to burn, and also leaves extra heavier atoms. Nitrogen [...]
2
06, 2017
What is a neutron? Atoms and Chemistry
A neutron star (from NASA) A neutron is a tiny particle like a proton, smaller than an atom. Like protons, neutrons are too small to see, even with an electron [...]
2
06, 2017
Molecules – Simple science – Chemistry
Protein molecules - each dot is one molecule. What is a molecule? A molecule is a group of two or more atoms that stick together. Molecules (MOLL-uh-cyools) are so small [...]
