If form changes but identity doesn't change then it is a physical change.
Magnesium is not a change of any sort. It is a metallic element that can undergo both physical an chemical changes.
If you are not concerned about atoms, electrons, neutrons, protons and other sub atomic particles, but confine to chemical substances occurring in nature or man made, the substance that cannot be broken into simpler substances is an "element" (usually enumerated in a periodic table).A chemical element cannot be decomposed into a simpler substance.Elements. They are defined as substances in their simplest form and cannot be broken down or decomposed into any simpler substances. They include all elements in the periodic table of elements.
Potassium is not a change; potassium (K) is a chemical element.
no
Yes, an element can be decomposed into simpler substances through chemical reactions. This typically involves breaking the chemical bonds that hold the element's atoms together, resulting in the formation of new compounds or elements.
No. Sodium is an element and elements cannot be broken down (decomposed) by a chemical change.
Physical ------------------- It is a chemical change because some compounds from bread are thermally decomposed. The reaction is not reversible.
It is a chemical change because some compounds from bread are thermally decomposed.
No, hydrofluoric acid (HF) cannot be decomposed by a chemical change because it is a stable compound. Physical methods are typically used to separate HF into its constituent elements.
A physical change changes the physical properties of an element like color where chemical changes change the chemical properties of an element and usually can't be undone.
Physical. Melting is always a physical change.
If form changes but identity doesn't change then it is a physical change.
Carbon that cannot be decomposed is a chemical property. It is related to the chemical bonds and composition of the substance, indicating that the carbon atoms are tightly held together in a way that resists decomposition through physical means.
Sodium is a chemical element, not a change.
Iron is a chemical element, not a "change".
Iron is a chemical element, not a "change" !