a chemical reaction
An element cannot be separated into simpler substances by chemical means.
Substances that cannot dissolve in water are called insoluble substances. These substances do not mix with water and remain as separate phases when added to water.
All substances can be broken into any other substances (or elements) by chemical or physical methods.
Elements are substances that cannot be split into simpler substances by chemical means. They are made up of only one type of atom.
a chemical reaction
Our body cannot fight all substances.
They are two different measurements. One is a length and the other an area. You cannot combine the two.
You cannot combine Pokémon.
Some substances are biodegradable because they can be broken down by microorganisms into simpler, harmless compounds. This usually happens in the presence of oxygen. On the other hand, substances that are not biodegradable often have complex chemical structures that microorganisms cannot easily break down, leading to accumulation in the environment.
Elements.
An element cannot be separated into simpler substances by chemical means.
Substances that cannot be chemically broken down into simpler substances are called elements.
Substances that cannot dissolve in water are called insoluble substances. These substances do not mix with water and remain as separate phases when added to water.
Elements combine to form compounds through chemical bonding, where atoms of different elements share or exchange electrons to achieve a stable configuration. This results in the formation of compounds with distinct properties different from the elements that make them up. Elements, on the other hand, do not combine to form other elements because they are unique substances that cannot be broken down into simpler substances by ordinary chemical reactions.
Very briefly, no.First, ions do not combine to form molecules. Ions are formed by transferring electrons; molecules are formed by sharing electrons. Ionic substances are held together by attraction of positive and negative ions, much like magnets.In both ionic and molecular substances, once bonds are made, electrons cannot move from atom to atom, ion to ion, or molecule to molecule. Because the electrons cannot move, no current can flow.As a side note, ionic substances can conduct if the ionsbecome mobile by melting the substance or dissolving it in water.
All matter is made up of different elements. Elements are pure substances that cannot be broken down further by chemical means. They combine to form compounds which make up all the substances we see around us.