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which correctly summarizes the trend in electron affinity?

 

28/02/2021

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Trends in First Electron Affinity. Chemistry. Related Questions in Chemistry. The electron affinity of an atom or molecule is the propensity for the particle to gain an electron. Check all that apply. S > Se > O. C. Se > O > S. D. S > O > Se. The electron affinity is the potential energy change of the atom when an electron is added to a neutral gaseous atom to form a negative ion. As you move left to right across the periodic table electron affinity increases. Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Both these factors result into greater attraction for the added electron. 1.) Now in a group electron affinity decreases down a group. Or if you need more Periodic Trend: Electron Affinity practice, you can also practice Periodic Trend: Electron Affinity practice problems. First, as the energy that is released by adding an electron to an isolated gaseous atom. ADVERTISEMENT. Arrange S, O and S e in ascending order of their electron affinity. 1 Answers. The trend for this is directly opposite from electron negativity (which is an atom's capability to give away electrons). Answer: B - It tends to be more negative across a period. N has positive electron affinity due to the extra stability of exactly half-filled p orbitals. the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. B. So the more negative the electron affinity the more favourable the electron addition process is. This is because going from left to right and bottom to top, the atomic radius decreases so it is easier for the nucleus to attract negative electrons. Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Electron Affinity concept. the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. 2 See answers johnkellock johnkellock The electron affinity of the elements generally increases across a period and sometimes decreases down a group in the periodic table. group1. The order of first electron affinity of O, S and Se is : A. O > S > Se. So when an electron is added in the fluorine atom it will suffer more electronegativity as all the electrons will be very close to each other and hence the electron gain enthalpy of chlorine is more negative than that of fluorine. Alessandra1235 Alessandra1235 Answer: Ca2+ Explanation: i just did the test. The order of first electron... chemistry. For example, when a fluorine atom in the gaseous state gains an electron to form F⁻(g), the associated energy change is -328 kJ/mol. As a result, nucleus bind with incoming extra electron more tightly and hence has more electron affinity. It tends to be very high for group 2. CL. Electronegativity of Magnesium is 1.31. Electronegativity of Calcium is 1. Correct answers: 2 question: Which correctly summarizes the trend in electron affinity? In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as:. Arrange S, O and Se in asce... chemistry. The reason for this is that the size of the fluorine atom is very small. While that’s a short description of the electron affinity trend, it would be helpful to dig deeper into the relationship between electron affinity and the periodic table. Summarizing Electron Affinity for Main-Group Elements Most groups (columns) of the periodic table do not exhibit any definite trend in electron affinity. It increases moving down a column or group and also increases moving from left to right across a row or period (except for the noble gases). What is a valence electron and why are they important to 9. Electron Affinity. In case of F − ion and O 6 − ion, due to small size, the inter-electronic repulsion is higher. The electron affinity trend tracks the electron affinity of an atom, the ability of a given atom to bind with an electron. This is more easily seen in symbol terms. The first electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions. it tends to be very high for group 2. it tends to be more negative across a period. Electron Affinity of Phosphorus is 72 kJ/mol. S e, S and O are members of group 1 6. Do you know the better answer! Example: Cl (g) + e-→ Cl-(g) E.A. Electron Affinity of Nitrogen is 7 kJ/mol. A. Electronegativity of Phosphorus is 2.19. Electron affinity can be defined in two equivalent ways. for main-group elements, electron affinity generally becomes more positive as you move to the right across a row 3.) Al. Asked By adminstaff @ 25/09/2019 01:02 PM. B. O < S e < S. C. S < O < S e. D. S < S e < O. Which element would release the most energy while adding an electron to a neutral atom in the gas phase? Boron You just need to familiarize yourself with the periodic trends. Among the elements of the main group, the general trend in the first ionization energy moving across a period is not followed between group 2 and group 13. (Phosphorus is in the third group in the p-block, so it must have 3 electrons in the p shell.) In period: Generally, electron affinity values of elements increase from left to right within the period. The electron affinity trend describes how as one follows the periodic table left to right electron affinity increases and how it usually decreases as one moves down a group of elements, top to bottom. Answer. Trends in Physical Properties. it tends to be more negative down a group. Electron affinity follows a trend on the periodic table. Asked By adminstaff @ 25/09/2019 01:02 PM. A negative electron affinity means energy must be input in order to attach an electron to the ion. 8. Electronegativity of Nitrogen is 3.04. Video Explanation. Chemistry. You can view video lessons to learn Periodic Trend: Electron Affinity. Hard. it tends to remain the same across periods. = -349 kJ/mol Notice the sign on the energy is negative. A. Ca B. Br C. S D. B. Here, electron capture is an endothermic process. What are the observed periodic trends in electron affinity? Electron Affinity. The lower an atom’s electron affinity value, the easier an atom will accept an electron. Electron Affinity of Calcium is 2.37 kJ/mol. Which correctly summarizes the trend in electron affinity? Valence electrons can be shown using Lewis structure. Electron Affinity. Electron affinity increases upward for the groups and from left to right across periods of a periodic table because the electrons added to energy levels become closer to the nucleus, thus a stronger attraction between the nucleus and its electrons. Moving from left to right and bottom to top on the period table, electron affinity increases. [Answer] Which correctly summarizes the trend in electron affinity? In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. What is the periodic trend for valence electrons when look 10. P. Cl. Hence, less energy is evolved in the formation of the ion. In fact, that atomic size decreases and nuclear charge (atomic number) gradually increases on moving left to right within the period. Based on this trend, an electron will be most strongly attracted to Na. So, Fluorine has the highest electron affinity among 1st period elements. Now its your turn, "The more we share The more we have". In general, electron affinity values becomes more and more negative on moving from left to right in a period. Submit your answer . Electron affinity follows a trend like electronegativity and hence increases as we move from left to right across a period. Electron affinity is the attraction a neutral atom has for a non-bonding electron. Electron affinity typically drops as one moves down a group of elements. W 12. Which of the following atoms would gain two electrons to fill its valence energy level? A cation 14.An anion electrons causing the ion to have electrons causing it to have a Electron Affinity Trends . Not all elements form stable negative ions in which case the electron affinity is zero or even positive. There really is no shortcut for this. LOGIN TO VIEW ANSWER. Electron Affinity and Electronegativity of Calcium. Trend in Periodic Table . Comparing Group 6 and Group 7 values . It tends to be more negative down a group. The value may be either positive or negative. First electron affinities have negative values. S e < S < O. Periods in the periodic table (ESABO) The following diagram illustrates some of the key trends in the periods: Figure 5.2: Trends … It tends to remain the same across periods. A similar reversal of the expected trend happens between oxygen and sulphur in Group 6. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as:. The second (reverse) definition is that electron affinity is the energy required to remove an electron from a singly charged gaseous negative ion. When electrons are removed from the outermost shell of a calcium atom, the atom becomes . Electron affinity is the energy change that results from adding an electron to a gaseous atom. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.. This is because energy is usually released in this process, as opposed to ionization energy, which requires energy. This is because on moving from left to right in a period, the atomic size decreases while nuclear charge increases. Which correctly summarizes the trend in electron affinity? It tends to be more negative across a period. Electron Affinity is the energy associated with the addition of an electon to a gaseous atom. Most relevant text from all around the web: Which correctly summarizes the t... Disclaimer: Our tool is still learning and trying its best to find the correct answer to your question. for main-group elements, electron affinity generally becomes more negative as you move to the right across a row 2.) In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. Electron Affinity of Magnesium is — kJ/mol. bonniegaming11 bonniegaming11 Answer: Ca2+ Explanation: I took the test lol. Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Trend of Electron Affinity Across The Periodic Table. Electron Affinity and Electronegativity of Nitrogen. Electron Affinity. Electron affinity can be defined as the capability of an atom to gain an electron. Trends in Physical Properties. The first electron affinity of oxygen (-142 kJ mol-1) is smaller than that of sulphur (-200 kJ mol-1) for exactly the same reason that fluorine's is smaller than chlorine's. Because this value is negative (energy is released), we say that the electron affinity of fluorine is favorable. It is the energy released (per mole of X) when this change happens. Defining first electron affinity. Remember that greater the distance, the less of an attraction; thus, less energy is released when an electron is added to the outside orbital. Medium. Br. Among the group 1A metals, however, electron affinity becomes more positive as we move down the column (adding an electron becomes less exothermic). Which correctly summarizes the trend in electron affinity? How many valence electrons are there in an atom of oxyge 11. Which correctly summarizes the trend in electron affinity? a cation that has a smaller radius than the atom. Answer. So its electron configuration is: \([\text{Ne}]3\text{s}^{2}3\text{p}^{3}\).

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