By 'normally,' we mean 'through chemical means.' Strictly speaking, the atom (the smallest single unit of an identifiable element) is the smallest piece of something that there can be, within the field of chemistry, that is. The word atom is derived from a greek word that means 'indivisible,' because it is usually just that, indivisible.
Chemistry is largely a science of how atoms and the electrons orbiting atoms behave and interact. And that's why there is always this caveat; outside the field of chemistry, nuclear reactions can break apart individual atoms and recombine them. Nuclear reactions are differentiated from chemical ones because they go beyond mere electron interactions, into the nucleus of an atom, and break apart, rearrange, and recombine the internal constituent parts of atoms, protons and neutrons.
Examples could include the fusion of hydrogen into helium that powers the sun, uranium enrichment to create nuclear fuel, or radioactive decay in general. Only through nuclear reactions can one thing truly become something completely different. Within the field of chemistry, there is no 'different,' only temporary recombination.
Interference with the brain's carefully regulated chemical environment may cause damaging amounts of normally present substances (carbon dioxide, potassium) to accumulate.
A chemical change is typically permanent because it involves the breaking and forming of chemical bonds, resulting in the creation of new substances with different properties. Unlike physical changes, where the original substances can often be recovered, chemical changes rearrange atoms at a molecular level, making it impossible to revert to the original materials without undergoing another chemical reaction. As a result, the changes are often irreversible under normal conditions.
No, emulsifiers are not catalysts. Emulsifiers help stabilize and mix together substances that would normally separate, such as oil and water, by reducing the surface tension between them. Catalysts, on the other hand, are substances that speed up chemical reactions without being consumed in the process.
No. elements and all other mater will normally have no charge.
The periodic table organizes elements according to the nature of their valence levels. The number of electrons needed to complete the valence level largely determines the chemical behavior of the element. Within groups or columns, the elements will have similar chemical properties. The elements go from more to less active from left to right, with the column on the far right containing those elements that are considered inert, or not chemically active normally.
Interference with the brain's carefully regulated chemical environment may cause damaging amounts of normally present substances (carbon dioxide, potassium) to accumulate.
No, it doesn't normally react with other elements.
Chemical reactions, normally. However, radioactivity, nuclear fission, or nuclear fusion also fit this definition.
The plant needs water, normally from the ground, and carbon dioxide from the air. It also needs other elements, such as nitrogen, to create the chemical compounds that are used in photosynthesis.
Chemical reactions, normally. However, radioactivity, nuclear fission, or nuclear fusion also fit this definition.
Though a nuclear reaction could be the answer to this question, it is more probable that a chemical reaction is the change of one or more substances into a different substance or different substances. (The changes in nuclear reactions normally include only a single element.)Examples abound. The elements hydrogen (H2) and oxygen (O2) combine in a chemical reaction to form water (H2O) in the following familiar reaction:2H2 + O2 => 2H2OWhen ozone (O3) breaks down spontaneously, it forms oxygen in the following reaction:2O3 => 3O2
These substances are called immiscible; for example water and vegetable oil.
No, an item for consumer use normally won't contain harmful substances; if it did, there would be a label saying it did.
A chemical change is typically permanent because it involves the breaking and forming of chemical bonds, resulting in the creation of new substances with different properties. Unlike physical changes, where the original substances can often be recovered, chemical changes rearrange atoms at a molecular level, making it impossible to revert to the original materials without undergoing another chemical reaction. As a result, the changes are often irreversible under normal conditions.
Noble gas family consisting of Helium, argon, neon, krypton, Xenon and radon do not form chemical conds generally, however the heaviour gases like krypton and xenon form some compounds. The reason for chemical inertness of these elements is their stable electronic configuration which makes them most stable and least in energy.
true
False. Atoms of halogens, such as chlorine and fluorine, do form chemical bonds with other elements to achieve a stable electron configuration. Halogens are highly reactive and tend to form bonds with other elements to complete their outer electron shell.