An anode and a cathode are the two types of terminals in an electronic device. The cathode is the terminal where current leaves an electronic device. The anode is the terminal where current flows into an electronic device. Electrical current is the amount of charge that passes a fixed point in one unit of time.Know More
In a standard battery, such as a D-size flashlight battery, the anode is the positive terminal and the cathode is the negative terminal. The anode of a battery is involved in an oxidation reaction. Electrons that reside in the anode are transferred into the electrolyte as a result of this reaction. The cathode of a battery is involved in a reduction reaction. This results in the cathode gaining electrons from the electrolyte. Excess electrons in the cathode are forced out through the circuit and back into the anode. Electrons are negatively charged and are repelled by the negatively charged cathode. The force of this repulsion is called voltage.
In other electronic devices the polarity is reversed. The anode is the negative terminal and the cathode is the positive terminal. The flow of current remains the same. Current always flows out of the cathode and into the anode.Learn more about Chemistry
In chemistry, the term "hydrate" refers to a substance that contains water, while an anhydrous substance contains no water. Hydrates and anhydrates differ greatly in their reactions to water and their common uses.Full Answer >
Mass is a measure of the amount of matter that an object contains, while density is a measure of how much mass an object contains per a unit volume. Mass is measured in kilograms, while density is typically measured in kilograms per cubed meter. Both are widely used in scientific formulas that are crucial for engineers, scientists and other professionals.Full Answer >
In chemistry, adhesion refers to the tendency of unlike molecules to bond with one another, while cohesion refers to the attractive force between molecules of the same type. Surface tension, which is an essential property of water, illustrates the relationship between adhesion and cohesion.Full Answer >
The major defining feature of metals is that electrons flow relatively freely between atoms in any object composed of two or more metal atoms, whereas electrons around nonmetals are more tightly bound to their respective nuclei or within individual chemical bonds. This results in other significant features of metal, particularly their high thermal and electrical conductivity. A large majority of known elements are metals.Full Answer >