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"Molecular element" is a much narrower category than "molecular substance". The kinetic units* of a molecular element contain at least two atoms, but all the atoms in the kinetic unit must be atoms of the same element. A molecular substance may contain any number of atoms of any number of elements. Therefore, every molecular element is a molecular substance, but the reverse is not true. The only additional requirements for a molecular substance are that all its kinetic units must have the same chemical composition and must contain at least two atoms but must not have any net electrical charge.
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*A kinetic unit is the smallest portion of a substance that moves further apart on average from other kinetic units when the substance expands while maintaining nearly constant interatomic distances within the kinetic unit itself.
What else can I help you with?
How are a solution and a substance similar and how are they different?
A substance is matter that is uniform in composition. A substance can be an element or compound. A solution is another name for a homogeneous mixture. It is also uniform in composition, but a solution is made by physically combining two or more substances.
What kind of substance of water?
Water is considered a pure chemical substance. Its mass and properties are similar to many of the other constituent elements.
Are copper and silver similar or different?
Copper and silver are both metallic elements, but they have different properties. Copper is reddish-brown in color, while silver is shiny and white. They also have different melting points and densities.
Which elements have similar chemical properties in sulphur and helium?
Sulphur and helium have entirely different properties. Sulphur has properties similar to group 16 elements. Helium has properties similar to group 18 elements.
What is the similar and difference of elements and compound?
DIFFERENCES• Compounds have two or more different types of atoms.• Elements are pure substances that have the exact same type of atom.SIMILARITIES• They are both pure substances.
Is elements chemically combine they form compounds that have properties that are similar to those of the uncombined elememts?
No, compounds do not necessarily have similar properties to their uncompounded elements. Example: Hydrogen and Oxygen are both gasses at normal temperature and pressure, but their compound, dihydrogen oxide (water) is a very distinctly different substance.
How sodium chloride is a substance that has similar properties as sodium and chlorine or is it an entirely different substance with its own unique properties?
Sodium chloride is it an entirely different substance with its own unique properties.
What is the chemical behavior of different elements and what is it determined by?
The chemical behavior of different elements is determined by their electron configurations. Elements with similar electron configurations exhibit similar chemical behavior. For example, elements in the same group of the periodic table tend to have similar chemical properties due to their shared electron configurations.
Different compounds can be formed from similar elements?
Yes. And this might blow your mind but different compounds can even be formed from the same number and type of elements. Isomers! Example: Theobromine= vasodilator Theophylline= anti-inflammatory Same amount and type of elements, but arranged differently makes a completely different compound.
Do elements have more similar properties when they are found in the same row or the same column?
Elements have more similar properties when they are found in the same column. Elements in the same column, also known as group or family, have similar chemical properties because they have the same number of valence electrons. Elements in the same row, also known as period, have different properties because they have different electron configurations.
What is different and similar about isomers?
Isomers are similar in that they have the same molecular formula, but there are also differences because their structural formulae are different. The type and degree of the differences in behaviour depends on which sort of isomerism it is.
Can compounds composed of different elements have similar properties?
Yes. (Salts are a good example of this.)
