The short answer is 'nothing'. An element is a pure substance which cannot be made any simpler by chemical means.
However, if we go beyond chemistry into nuclear physics, then heavier atoms split apart in the process of radioactivity, or can be made to split by neutron bombardment. For instance, if a uranium 235 atom is hit by a neutron, one way it can split produces barium and krypton.
An "element" is a pure substance and the application of heat can not split it as there is nothing to split.
... atoms of at least one other element than the one that is split.
An element is a pure substance that cannot be split into simpler substances by chemical means while a mixture is a combination of two or more substances
no it is in its simplest form. unless it is split from an explosion
Water is not an element. It is composed of two Hydrogen atoms and one Oxygen atom, therefore it is a compound. However, when you pass electricity through water under the right circumstance, the electricity will split the water into its component elements, Hydrogen and Oxygen.
An "element" is a pure substance and the application of heat can not split it as there is nothing to split.
Chlorine and Fluorine cause split in ozone. They are present as CFC's.
Elements cannot be split using chemical reactions.
an element
Uranium
No
element
An atom. An atom can be split into smaller pieces, but if you do that, you no longer have the same element.
... atoms of at least one other element than the one that is split.
An element.
Mechanical pressure will not split water into its component elements.
Fissile isotopes are isotopes of an element that can be split through fission