Electron Affinity MDCAT Quiz: Released when an atom in the gas phase gains an electron to form a negatively charged ion, anion. Electron affinity helps determine how easily an element can accept an electron and form an anion, which is very important in understanding the reactivity of nonmetals. A strong understanding of electron affinity is essential for answering questions in the MDCAT Quiz, particularly those related to trends in the periodic table and the formation of ions.
H2: Trends in Electron Affinity
In general, electron affinity will become more negative as you go across a period from left to right. That is, as atoms get smaller, the added electron is more strongly attracted to the nucleus, and more energy is released. Of course, there are exceptions, notably the noble gases and group 2 elements, whose electron affinities are low due to their full valence electron shells. As you go down a group, electron affinity tends to become less negative. This occurs because the atomic radius increases, and the added electron is farther from the nucleus, resulting in less attraction and less energy released when an electron is gained. The trends in electron affinity are very important in the understanding of the chemical behavior of elements in reactions, especially among the halogens and other nonmetals.
H3: Electron Affinity Quiz
The MDCAT Quiz on electron affinity will test the ability of students to predict and explain trends in electron affinity across periods and groups. Students will be asked to make comparisons regarding the electron affinities of different elements, identify exceptions to the general trends, and understand the implications of electron affinity in chemical bonding and reactivity. Practicing with such questions will help students develop a deeper understanding of electron affinity and enable them to answer related questions confidently in the MDCAT exam.
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H3: Free Flashcard for Electron Affinity
In order to reinforce their learning of electron affinity, MDCAT students can use the Free Flashcard on this subject. These flashcards contain concise summaries of trends in electron affinity, the factors that affect it, and exceptions to the general periodic trends. Regular reviewing of the flashcards will enable students to retain important information and apply it effectively in solving electron affinity-related problems. This is particularly useful for efficient revision, ensuring that students are well-prepared for any questions related to electron affinity on the MDCAT exam.
Electron affinity refers to the energy change when an ________ is added to a neutral atom.
electron
The electron affinity is usually expressed in ________ energy.
negative
Higher electron affinity is generally seen in ________ of the periodic table.
halogens
A more negative electron affinity value indicates a ________ attraction for an electron.
stronger
The electron affinity of an element generally becomes more negative as you move ________ a group.
up
The addition of an electron to an atom generally results in the formation of a ________ ion.
anion
The noble gases have ________ electron affinity compared to other elements.
low
Electron affinity is the opposite of ________.
ionization energy
Elements with a high electron affinity generally have a high ________ value.
electronegativity
The electron affinity of oxygen is more negative than that of ________.
fluorine
The electron affinity of chlorine is more negative than that of ________.
bromine
The addition of an electron to a ________ atom can release a large amount of energy.
halogen
Electron affinity tends to increase as you move ________ across a period.
left to right
In general, alkali metals have a ________ electron affinity.
low
The electron affinity of an atom is influenced by the ________ in its outermost electron shell.
nuclear charge
Electron affinity increases as you move ________ the periodic table.
across a period
Elements with a very negative electron affinity often form ________ ions.
stable
The electron affinity of an atom is the energy change that occurs when an electron is added to the ________.
atom
Fluorine has the ________ electron affinity of any element.
most negative
The electron affinity of chlorine is more negative than ________.
that of sulfur
The addition of an electron to an atom in the gas phase results in a ________ energy change.
negative
The electron affinity of an element depends on the ________ of the nucleus.
size
The more ________ an atom’s electron affinity, the more stable the anion formed will be.
negative
The electron affinity of hydrogen is ________.
positive
The electron affinity of an atom is measured under ________ conditions.
standard
Electron affinity measures the ________ of an atom for an electron.
attraction
As you move from left to right across a period, electron affinity generally becomes ________.
more negative
The electron affinity of ________ is nearly zero.
noble gases
Elements in Group ________ tend to have the most negative electron affinities.
17
Electron affinity of an atom is an example of a ________ property.
exothermic
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