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Why are only about 100 of the million of known substances identified as Element?
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How absorption spectra can be used in the identification of unknowns?
Each substance has known specific maximum of absorption. Comparing spectra substances can be identified.
What are substances that can not be broken down into simpler stuff by any chemical means?
The simplest substance that you can obtain by ordinary means is an element.An element is a substance than cannot be separated or broken down into simpler substances by chemical means.
Examples of a compound are what?
A compound is one of the two things of a pure substance the other thing is a element
How was helium identified on the sun with a spectroscope?
Every element, when heated, sends out light with characteristic spectral lines. These same lines are also absorbed when the element is present in an atmosphere between a light source and the observer. When studying spectral lines of the sun some lines were noted that were not known on earth, from which we concluded that there must be an inknown new element. Which was subsequently found on earth.
Substances that fight bacteria are known as?
leukocytes
A substance that cannot be split into simpler substances by chemical means is known as?
An element.
How do you identlfy reactants and products in a chemical reaction?
They are identified by the commonly known symbols for each element as well as a subscript for the number of occurrences of the element in a molecule.
Which element is the mostly deadly poison?
Plutonium is one of the most deadly substances known to man.
How absorption spectra can be used in the identification of unknowns?
Each substance has known specific maximum of absorption. Comparing spectra substances can be identified.
Each known element blank be broken down into any simpler substances?
Impossible by chemiacal methods
Is salt a compound or an element?
The substances known as salts are compounds. Any compound is made from two or more [atomic] Elements.
What element has the lowest denisty of all of the elements?
Hydrogen is the least dense of all the elements and all other known substances.
Is a salt an element a compound?
The substances known as salts are compounds. Any compound is made from two or more [atomic] Elements.
Pure substances that cannot be separated into simpler substances?
Element (It IS possible to alter elements by bombarding them with sub atomic particles and attempting to either augment or spilt the nucleus. Some elements are self-altering. These are the radioactive isotopes and they can change to several different elements before reaching their end state.)
Is rain an element?
Rain is NOT an element. It is a compound of Hydrogen and Oxygen [Water] Water was one of the 'Elements' identified by Ancient Greek philosphers with the others being Earth, Air and Fire. It is now known that this approach is incorrect.
What is a substance that can not be broken down in to any other substances by any chemical means?
This is the definition of an element. The known elements are listed on the periodic table of elements.
What does every element emit if it is heated by passing an electric discharge through its gas or vapor?
A specific pattern of light. This permits elements to be identified by an instrument known as a spectroscope.
