In chemistry and physics, the atomic number<span> of a chemical </span>element<span> (also </span>known<span> as its </span>proton number<span>) is </span>the number of protons<span> found in the nucleus of an </span>atom<span> of that </span>element<span>, and therefore identical to the charge </span>number<span> of the nucleus. It is conventionally represented by the symbol Z.</span>
Explanation:
For transfer of heat between any two substances or matter can be occurred by conduction or convection process.
Conduction is a process in which two objects of different temperature are placed in contact with each other. Therefore, heat transfers from hotter object to colder object until the temperature of both objects becomes equal.
For example, a metal spoon placed in a hot cup of tea.
Convection is a process in which a fluid generally liquid or gas is heated and denser material (colder) sinks at the bottom whereas less denser material (hotter) rises at the top. This causes conventional currents in the fluid.
For example, heating rice in a pot full of water.
When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.
<h3>What is change of state?</h3>
Change of state of matter is the transformation of a substance from one phase of matter to another.
When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.
Learn more about matter here:
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