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Elements normally cannot be broken down into simpler substances by ordinary chemical reactionsBut how can they?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
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What can imbalance in the brain's carefully regulated chemical substances cause?
Interference with the brain's carefully regulated chemical environment may cause damaging amounts of normally present substances (carbon dioxide, potassium) to accumulate.
What does The periodic table organize elements into groups that have similar?
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.
Do elements have a negative electrical charge?
No. elements and all other mater will normally have no charge.
What happens when silicon reacts with oxygen?
Normally, elements react with oxygen to form their oxides. The chemical formula for the oxide of silica is SiO2. It is a very common compound on earth.
Why chemical reaction can't be normally reversed?
becoz the chemical reaction is irreversible to change it.............
Which substances must a green plant obtain from its environment in order to convert light energy into chemical energy?
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.
What can imbalance in the brain's carefully regulated chemical substances cause?
Interference with the brain's carefully regulated chemical environment may cause damaging amounts of normally present substances (carbon dioxide, potassium) to accumulate.
What is the compatibility of neon with other elements?
No, it doesn't normally react with other elements.
What is a change that occurs when one or more substances change into new substances with different properties?
Chemical reactions, normally. However, radioactivity, nuclear fission, or nuclear fusion also fit this definition.
What is a chang that occurs when one or more substances change into a entirely new substances with different properties?
Chemical reactions, normally. However, radioactivity, nuclear fission, or nuclear fusion also fit this definition.
Process which substances are changed into different substances?
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
Different elements are made up of different kinds of?
Elements can be combined in several different ways. Elements which undergo no chemical reactions when combined are called mixtures. Normally, the elements in a mixture retain their original properties, but metals can be combined into mixtures called alloys to produced new properties, though these properties tend to be the intermediate sum of the collective properties of the metals involved. Elements which combine chemically to produce entirely new substances are called chemical compounds.
What is the balanced chemical equation for burning plastic?
There are lots of different types of plastics, the ones normally encounterd contain a polymer and additives so they are not pure substances and you cannot write a balanced chemical equation for combustion.
Do gym sets made of plastic contain any harmful chemical substance?
No, an item for consumer use normally won't contain harmful substances; if it did, there would be a label saying it did.
What are substances that do not normally mix?
These substances are called immiscible; for example water and vegetable oil.
Does Food normally contains radioactive substances?
true
Which family of elements do not normally from chemical bonds?
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.
