What makes atoms spread out around a central atom? Which force keeps electrons orbiting the nucleus: the strong or weak force? What does the electrostatic force do inside the nucleus? What makes up the nucleus of an atom? Which two fundamental forces have been resolved into one?
What makes atoms spread out around a central atom? What makes an atom radioactive? The positively charged particle in an atom is the Negatively charged particles are found where in an atom? Why are atoms neutral despite having charged subatomic particles?
protons, neutrons and electrons. The protons and neutrons are in the nucleus of an atom. The smallest particles, the electrons, circle around the nucleus. If the atoms in objects lose any of these small particles, high-energy waves are produced, and this is what makes an object radioactive...
Some substances are radioactive: they naturally split into simpler substances and give off tiny particles or energy in the process. Again, this makes sense if atoms exist and they're built from smaller particles (protons, neutrons, and electrons). Scientists can split big atoms into smaller ones...
The field of physics has increased human understanding of sound, light and heat, and it has enhanced knowledge about electricity, gravity, magnetism and mechanical forces. Physicists can focus on topics ranging from tiny objects like atoms and subatomic particles to enormous things like planets and ...
Nuclear reactors split atoms of uranium, a mildly radioactive element, to form heat. This process releases heat and neutrons. Some of these neutrons go on to collide with other uranium atoms, causing them to fission, which keeps the nuclear reaction going. ...
The nuclei of atoms can be regarded, in a sense, of sitting at the center of all matter, so their extreme stability makes sense in a cosmos rife in organization and capable of sustaining life on at least one humble planet. But nuclei are not perfectly stable, and over time, they decay...
have 26 protons and 30 neutrons. The excess of neutrons granted to iron by neutron capture makes the iron atoms unstable and radioactive due to a huge imbalance between protons and neutrons. This results in some of the atoms undergoingbeta decay, with neutrons transforming into protons via the...
Are there metals far scarcer than iridium and enormously more expensive than gold — while at the same time, non-radioactive or very, very nearly so? As it happens, yes. A line of radioactive cosmetics introduced in 1930 Each element comes in varieties called isotopes whose atoms differ in...
In addition to this, the main byproducts of fusion power, neutrons and helium, are not radioactive and thus don't present the same disposal problems as the byproduct of nuclear fission plants — with fission being almost the mirror image of fusion, breaking large atoms apart into sma...