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What characteristics must a substance have in order to be classified as an element?
Wiki User
∙ 9y ago
Each element has a specific number of protons in the nuclei of its atoms. This number is known as the atomic number for the element. For instance, the atomic number of hydrogen is one because it has a just one proton in its nucleus. The atomic number of oxygen is eight, again because it has eight protons in its nucleus. For a full summary see the link for the Periodic Table.
Wiki User
∙ 10y ago
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What is the meaning of extensive property?
An extensive property is one that relies on the amount of the substance. An intensive property is one that does not have to rely on the amount of substance present. Some examples of extensive properties are mass and volume, because both rely on the amount of substance present in order to be calculated.
Grams to formula units?
It depends on the substance and its molar mass.In order to convert from grams to formula units, you must first convert grams to moles, then moles to formula units (grams --> moles --> formula units).1. Divide the mass (g) of the given substance by the substance's molar mass.2. Multiply the number of moles found in Step 1 (above) by Avogadro's number (6.022 x 1023).---- Mass substance ----- X 6.022 x 1023 formula unitsMolar mass substanceCONVERSION FACTORMass (g) substance x 1 mol substance ------- x ----- Avogadro's number/////////////////// molar mass (g) substance ------------ 1 mol substance
What is the grouping of thing together based on specific characteristics called?
This is called classification. We classify things all the time in our daily life. A trip to the supermarket would be a nightmare if the canned goods were not classified together or if the beef was in with the veg etc. Classification systems need to be purposeful and useful. One could group confectioneries together by colour but it is better to do so by flavour/style/size etc. Similarly when it comes to classification of living organisms one has several possible approaches. Looking at very overt characteristics such as colour would be fruitless as often colours are shared by a variety of different species or not even shared within a species. Even looking at overall morphology is a somewhat misleading method of classifying living things as using this method one would end up putting sharks and dolphins in together. Modern classification of organisms takes a rounded approach looking at the whole organism, internal, external, behavioral and genetic characteristics. Thus we put mammals together and within that order we then separate out the primates, cats and so forth. Classification starts with shared characteristics but useful classification looks also at the relationship between the things being classified.
Why did Dmitri mendeleev reverse the order of some elements in the periodic table?
He was bold enough to reverse the order of some pairs of elements and to predict that their atomic masses were incorrect. Some of these predictions were correct, but others were not, because we now know that the fundamental basis of the periodic table is atomic number rather than atomic mass.
What is a substance that has a pH of more than 7.0.?
an example is baking soda, milk of magnesia, blood.
What are the characteristics by which animals can be classified?
genus, species, kingdom, phylum, class, order, there might be another one.
What determines the species an organism is classified as?
Animals are classified into the kingdom Animalia, from there they are further classified as all other organisms are into various subgroups called phylum, order, class, family, genus and finally species. Different characteristics as well as genetic studies are used to classify each animal into the proper subgroup.
What must someone know in order to classify it as a pure substance?
A pure substance is a substance that consists solely of the same atoms/molecules.So a volume of water that contains only H2O is a pure substance. A block of iron that contains only Fe atoms is pure substance. A pure substance can be composed of atoms or molecules as I said before BUT they have to be exactly the same.A substance that has constant chemical composition and characteristics
What is a substance that makes it appear on the periodictable?
In order to appear on the periodic table a substance must be an element, consisting of only one type of atom with a given number of protons in its nucleus. This number, called atomic number, is unique to each element.
Is the particles of a pure substance different?
No. Because a pure substance, no matter if an element, compound, it can only contain one kind of particle .
Is silver organic?
No Silver is an element that contains only silver. In order to be considered organic a substance must be a compound that contains carbon and hydrogen.
How is a gorillas classified?
Gorilla is classified in class Mammalia ,Its order is Primates .
What Chemical element is a substance made up of atoms?
Everything that is made up of atoms is considered a chemical. But don't get confused by this statement. This doesn't mean that a desk is a chemical, but that it is made up of chemicals. In order to be classified as an actual chemical, a substance must be pure, meaning that it has its own chemical formula. Steel is not a chemical, as it is a mixture of different metals and not a compound. The metals in steel are not bonded together and do not fomr a new substance. Salt is a chemical. Acetate is a chemical. There is nothing in this world that is not made up of chemicals.
What is the order in which organisms are classified?
Organisms are classified by Kingdom, Phylum, Class, Order, Family, Genus, Species, and Sub-species.
The period of an element can be determined by what?
The total number of electron shells in an atom has determines its period grouping.
What is the order of an element in a group?
The order of an element in a multiplicative group is the power to which it must be raised to get the identity element.
What order are tigers classified in?
Carnivora
