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These are the smallest units of matter that form all chemical substances and that cannot be further broken down by chemical reactions?
Wiki User
∙ 14y ago
All chemical elements have an atom as their smallest unit.
Atoms are composed of varying amounts of electrons and protons. All elements except Hydrogen also have neutrons.
Note that there is a difference between your phrase "all chemical substances" and my use of the term "all chemical elements"..... an element is made of atoms - a chemical "substance" may be made of molecules - groupings of different elements bonded in differing amounts - and it may be theoretically possible for us to break down every molecule into its constituent atoms, I'm not sure that it is always physically possible.
Wiki User
∙ 14y ago
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Why mercury can not further decomposed into simpler substances?
because a substance cannot be decomposed into simplier substances by chemical or physical means
Is water evaporating into steam chemical or physical change?
It's a physical change because no new substances are formed, the molecules simply get further apart.
A subtance that cannot be separated or broken down into simpler substances by chemical means?
Is a pure substance such as an element. Remember elements can not be broken down further by chemical or physical processes.
Are molecules in cool substances closer together than in hot substances?
Yes, they are. Molecules get further apart as they gain energy.
Is grapes fermenting chemical or physical changes?
Fermentation is a chemical change, as new substances, alcohol and carbon dioxide are produced. It would be extremely unlikely that leaving a glass of grape juice to ferment would produce a drinkable wine. Further oxidation to vinegar would be almost inevitable.
What is chysical change?
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
Why mercury can not further decomposed into simpler substances?
because a substance cannot be decomposed into simplier substances by chemical or physical means
What happens if you use chemical reactions to break down matter until it can be broken down no further then the substance?
Chemical elements are the resulting products.
What properties can be observed during a chemical reaction?
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminescence -formation of new compounds
Can chemical reactions kill bacteria?
certain chemical reactions do kill bacteria for example when bacteria enters the body the stomach contains High concentrations of Hydrochloric acid which destroys the bacteria preventing further damage to the body.
What results in a chemical change?
Chemical changes occur when a substance combines with another to form a new substance, called synthesis or, alternatively, decomposes into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. Some reactions produce heat and are called exothermicreactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. Understanding chemical changes is a major part of the science ofchemistry. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen. So much energy is released that the hydrogen gas released spontaneously burns in the air.
When the stabilized state of an equilibrium system is altered further chemical reactions begin until a new equilibrium is reached?
True
What type of reaction occurs when one compound takes the place of another compound in the reaction?
A single-replacement reaction
Compare and contrast elements and compounds.?
Substances are either elements or compounds. Elements are substances in their simplest form that cannot be separated further through chemical reactions. Examples of elements are oxygen (O2), carbon (C2), and hydrogen (H2). Compounds are compositions of two or more elements. Examples of compounds are water (H2O), carbon dioxide (CO2), and sodium chloride - table salt (NaCl).
Is water evaporating into steam physical or chemical?
It's a physical change because no new substances are formed, the molecules simply get further apart.
What is the Site for carbohydrate production during light independent reaction?
The light-independent reactions of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. These reactions occur in the stroma, the fluid-filled area of a chloroplast outside of the thylakoid membranes. These reactions take the light-dependent reactions and perform further chemical processes on them. There are three phases to the light-independent reactions, collectively called the Calvin cycle: carbon fixation, reduction reactions, and ribulose 1,5-bisphosphate (RuBP) regeneration.
Is water evaporating into steam chemical or physical change?
It's a physical change because no new substances are formed, the molecules simply get further apart.
