When an atom or molecule gains one or more electrons is said to be?
When an atom or molecule gains one or more electrons it is said to be: Reduced.
When a molecule gains an electron that molecule has been?
Answer: Reduction occurs when a molecule gains an electron or decreases its oxidation state. When a molecule is reduced, it gains energy.
Why is it called oxidation?
The term oxidation was first used by Antoine Lavoisier to signify the reaction of a substance with oxygen. Much later, it was realized that the substance, upon being oxidized, loses electrons, and the meaning was extended to include other reactions in which electrons are lost, regardless of whether oxygen was involved.
When an atom or molecule gains electrons it is said to be quizlet?
-when an atom or a molecule gains electrons, it is said to become reduced; -when it loses electrons, it is said to become oxidized.
What is called valency?
The combining capacity of an atom is known as its valency. The number of bonds that an atom can form as part of a compound is expressed by the valency of the element. We all know how electrons in an atom are arranged in shells/orbitals.
What does oxidising mean?
transitive verb. 1 : to combine with oxygen. 2 : to dehydrogenate especially by the action of oxygen. 3 : to change (a compound) by increasing the proportion of the electronegative part or change (an element or ion) from a lower to a higher positive valence : remove one or more electrons from (an atom, ion, or molecule …
When an atom ion or molecule loses one or more electrons it is called?
Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion.
What is oxidation and reduction quizlet?
Oxidation. Oxidation is the loss of electrons during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction.
Which is the definition of an isotope?
Listen to pronunciation. (I-soh-tope) A form of a chemical element in which the atoms have the same number of protons (part of the nucleus of an atom) but with a different number of neutrons (part of the nucleus of an atom). For example, carbon 12, carbon 13, and carbon 14 are isotopes of carbon.
What is the meaning of valence and valency?
valence, also spelled valency, in chemistry, the property of an element that determines the number of other atoms with which an atom of the element can combine. Introduced in 1868, the term is used to express both the power of combination of an element in general and the numerical value of the power of combination.
What is meant by oxidation and reduction?
Oxidation and reduction in terms of oxygen transfer Oxidation is the gain of oxygen. Reduction is the loss of oxygen.
What is meant by over oxidation?
Noun. overoxidation (usually uncountable, plural overoxidations) Excessive oxidation (or to a greater than normal extent)
What is meant by oxidation?
Listen to pronunciation. (OK-sih-DAY-shun) A chemical reaction that takes place when a substance comes into contact with oxygen or another oxidizing substance. Examples of oxidation are rust and the brown color on a cut apple.
Is oxidation loss or gain of electrons?
Oxidation is the process of losing an electrons, while reduction is the process of gaining them. Any chemical that causes another chemical to lose electrons (become oxidized) is called an oxidizing agent.
What does it mean when a molecule is oxidized or reduced?
Oxidation means the addition of oxygen to a molecule or the removal of hydrogen from a molecule. Reduction means the addition of hydrogen to a molecule or the removal of oxygen from a molecule.
What is an ion and isotope?
An ion is an atom with a net electric charge due to the loss or gain of one or more electrons. An isotope is each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties.
What is an isobar in chemistry?
Isobars are atoms (nuclides) of different chemical elements which differs in the chemical property but has the same physical property. So, we can say that isobars are those elements which have a different atomic number but the same mass number.
What is the difference between valency and oxidation state?
The main difference between valency and oxidation state is that valency is the number of electrons present in the outermost shell of an atom of a particular element whereas oxidation state is the number of electrons that an element in a particular compound has lost or gained.
What does oxidation mean?
Oxidation is a process in which a chemical substance changes because of the addition of oxygen. The reaction between magnesium metal and oxygen involves the oxidation of magnesium. When exposed to oxygen, silicon undergoes oxidation and forms silicon dioxide.
What is oxidation and reduction?
The terms oxidation and reduction can be defined in terms of the adding or removing oxygen to a compound. while this is not the most robust definition, as discussed below, it is the easiest to remember. Oxidation is the gain of oxygen. Reduction is the loss of oxygen.
Is oxidation gain of electrons?
Oxidation is the loss of electrons. Reduction is the gain of electrons. Oxidation and reduction always occur together, even though they can be written as separate chemical equations.
What is the meaning of gain or loss of electrons?
Oxidation is process in which an atom or ion looses electrons. The reduction is a process in which an atom or ion gains electrons.
Do isotopes gain or lose electrons?
Isotopes involve neutrons. There is some overlap. For example, isotopes can lose or gain electrons to form ions. Isotopes of Chlorine (Cl) gain an electron when they form ionic bonds. This results in a negative ion (the Chloride ion).
Are isotopes atoms?
Atoms with the same atomic number but with different atomic masses are called isotopes. Isotopes have identical chemical properties, yet have very different nuclear properties.
What do you mean by Isotones?
isotone, any of two or more species of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 are isotones, because the nucleus of this species of chlorine consists of 17 protons and 20 neutrons, whereas the nucleus of this species of potassium contains 19 protons and 20 neutrons.
What is the difference between isotopes and Isotones?
Isotopes are elements with same atomic number and different atomic mass number. Isotones are elements with same number of neutrons but different number of protons.
What is the difference between oxidation state and oxidation number?
The difference between the oxidation number and oxidation state is that the oxidation state defines the degree of oxidation of an atom in a molecule, whereas the oxidation number is defined as the charge that the central metal atom will retain even after all the ligands have been removed from the atom.
What is the gain of electrons called?
The gain of electrons is called reduction. Because any loss of electrons by one substance must be accompanied by a gain in electrons by something else, oxidation and reduction always occur together. As such, electron-transfer reactions are also called oxidation-reduction reactions, or simply redox reactions.
Why is oxidation called?
The term oxidation was first used by Antoine Lavoisier to signify the reaction of a substance with oxygen. Much later, it was realized that the substance, upon being oxidized, loses electrons, and the meaning was extended to include other reactions in which electrons are lost, regardless of whether oxygen was involved.
What happens when an atom gains an electron?
If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation). Energy may be lost or gained in the formation of an ion.