Ionization Energy of the Elements

Ionization Energy of the Elements The ionization energy, or ionization potential, is the energy required to completely remove an electron from a gaseous atom or ion. The closer and more tightly bound an electron is to the nucleus, the more difficult it will be to remove, and the higher its ionization energy will be. Key Takeaways: Ionization Energy Ionization energy is the amount of energy needed to completely remove an electron from a gaseous atom.Generally, the first ionization energy is lower than that required to remove subsequent electrons. There are exceptions.Ionization energy exhibits a trend on the periodic table. Ionization energy generally increases moving from left to right across a period or row and decreases moving top to bottom down an element group or column. Units for Ionization Energy Ionization energy is measured in electronvolts (eV). Sometimes the molar ionization energy is expressed, in J/mol. First vs Subsequent Ionization Energies The first ionization energy is the energy required to remove one electron from the parent atom. The second ionization energy is the energy required to remove a second valence electron from the univalent ion to form the divalent ion, and so on. Successive ionization energies increase. The second ionization energy is (almost) always greater than the first ionization energy. There are a couple of exceptions. The first ionization energy of boron is smaller than that of beryllium. The first ionization energy of oxygen is greater than that of nitrogen. The reason for the exceptions has to do with their electron configurations. In beryllium, the first electron comes from a 2s orbital, which can hold two electrons as is stable with one. In boron, the first electron is removed from a 2p orbital, which is stable when it holds three or six electrons. Both of the electrons removed to ionize oxygen and nitrogen come from the 2p orbital, but a nitrogen atom has three electrons in its p orbital (stable), while an oxygen atom has 4 electrons in the 2p orbital (less stable). Ionization Energy Trends in the Periodic Table Ionization energies increase moving from left to right across a period (decreasing atomic radius). Ionization energy decreases moving down a group (increasing atomic radius). Group I elements have low ionization energies because the loss of an electron forms a stable octet. It becomes harder to remove an electron as the atomic radius decreases because the electrons are generally closer to the nucleus, which is also more positively charged. The highest ionization energy value in a period is that of its noble gas. Terms Related to Ionization Energy The phrase ionization energy is used when discussing atoms or molecules in the gas phase. There are analogous terms for other systems. Work Function - The work function is the minimum energy needed to remove an electron from the surface of a solid. Electron Binding Energy - The electron binding energy is a more generic term for ionization energy of any chemical species. Its often used to compare energy values needed to remove electrons from neutral atoms, atomic ions, and polyatomic ions. Ionization Energy Versus Electron Affinity Another trend seen in the periodic table is electron affinity. Electron affinity is a measure of the energy released when a neutral atom in the gas phase gains an electron and forms a negatively charged ion (anion). While ionization energies may be measured with great precision, electron affinities are not as easy to measure. The trend to gain an electron increases moving from left to right across a period in the periodic table and decreases moving from top to bottom down an element group. The reasons electron affinity typically becomes smaller moving down the table is because each new period adds a new electron orbital. The valence electron spends more time further from the nucleus. Also, as you move down the periodic table, an atom has more electrons. Repulsion between the electrons makes it easier to remove an electron or harder to add one. Electron affinities are smaller values than ionization energies. This puts the trend in electron affinity moving across a period into perspective. Rather than a net release of energy when an electron is gain, a stable atom like helium actually requires energy to force ionization. A halogen, like fluorine, readily accepts another electron.

Ireland Vital Records - How to Obtain Information

Ireland Vital Records - How to Obtain Information Government registration of births, marriages and deaths in Ireland began January 1, 1864. Registration of marriages for non-Roman Catholics began in 1845. Many of the early years of civil registration of births, marriages and deaths have been microfilmed by the Mormons and are available through Family History Centers worldwide. Check the Family History Library Catalog online for details on what is available. Address:Office of the Registrar-General of Births, Deaths and MarriagesGovernment OfficesConvent Road , RoscommonPhone: (011) (353) 1 6711000Fax: (011) 353(0) 90 6632999Â   Ireland Vital Records: The General Register Office of Ireland has records of birth, marriage, and death occurring in all of Ireland from 1864 to 31 December 1921 and records from the Republic of Ireland (excluding the six north-eastern counties of Derry, Antrim, Down, Armagh, Fermanagh and Tyrone known as Northern Ireland) from 1 January 1922 on. The GRO also has records of non-Catholic marriages in Ireland from 1845. Indices are arranged in alphabetical order by name, and include the registration district (also known as the Superintendent Registrars District), and the volume and page number in which the entry is recorded. Through 1877 indices were arranged alphabetically, by year. From 1878 onwards each year was divided into quarters, January-March, April-June, July-September and October-December. FamilySearch has the Ireland Civil Registration Indexes 1845-1958 available for free searching online. Enclose the correct fee in Euros (check, International Money Order, cash, or Irish Postal Order, drawn on an Irish bank) made payable to The Civil Registration Service (GRO). The GRO also accepts credit card orders (the best method for international orders). Records are available by applying in person at the General Register Office, any local Superintendent Registrars Office, by postal mail, by fax (GRO only), or online. Please call or check the Web site before ordering to verify current fees and other information. Web Site: General Register Office of Ireland Ireland Birth Records: Dates: From 1864 Cost of copy: â‚ ¬20.00 certificate Comments: Be sure to request a full certificate or a photocopy of the original birth record, both of which contain the date and place of birth, given name, sex, fathers name and occupation, mothers name, informant of birth, date of registration and the signature of the Registrar.Application for an Irish Birth Certificate * Birth information prior to 1864 may be available from parish baptismal records which are kept at the National Library, Kildare Street, Dublin, 2. Online:Ireland Births and Baptisms Index, 1620-1881 (selected)Irish Family History Foundation – Baptismal/Birth Records Irish Death Records: Dates: From 1864 Cost of copy: â‚ ¬20.00 certificate (plus postage) Comments: Be sure to request a full certificate or a photocopy of the original death record, both of which contain date and place of death, name of deceased, sex, age (sometimes approximate), occupation, cause of death, informant of death (not necessarily a relative), date of registration and Registrars name. Even today, Irish death records do not usually include a maiden name for married women or date of birth for the deceased.Application for an Irish Death Certificate Online:Ireland Deaths Index, 1864-1870 (selected)Irish Family History Foundation – Burial/Death Records Irish Marriage Records: Dates: From 1845 (Protestant marriages), from 1864 (Roman Catholic marriages) Cost of copy: â‚ ¬20.00 certificate (plus postage) Comments: Marriage records in the GRO are cross-listed under the surname of both the bride and groom. Be sure to request a full certificate or a photocopy of the original marriage record, which contains the date and place of marriage, names of bride and groom, age, marital status (spinster, bachelor, widow, widower), occupation, place of residence at time of marriage, name and occupation of father of bride and groom, witnesses to marriage and clergyman who performed the ceremony. After 1950, additional information provided on marriage records includes the dates of birth for the bride and groom, mothers names, and a future address.Application for an Irish Marriage Certificate * Marriage information prior to 1864 may be available from parish marriage registers which are kept at the National Library, Kildare Street, Dublin, 2. Online:Ireland Marriages Index, 1619-1898 (selected)Irish Family History Foundation – Marriage Records

English medium education for people whose first language is not Essay

English medium education for people whose first language is not English - Essay Example The introduction of colonists’ language faced resistance from many parents in Malaysian society as they took it as the return of the colonist and feared the loss of their own language - their national identity. It is note-worthy that the business class parents or those involved in media or politics knew the value of learning the English Language so favoured it. Another issue was the insufficient availability of skilled teachers, especially within rural areas. This led the government to introduce both mediums of education while emphasizing on mastering English as a foreign language, parents were left to choose which way they wanted their children to learn, which in return brought discrimination in society. Mr. Mahathir, the Prime Minister, who introduced this policy showed his sadness over the decision of moving back to Malaya to educate children as it would bring difficulties for the students to cope with scientific developments in the future (Gooch, 2009). In the video clip w e are given a clear idea that the Malaysian government was familiar with the significance of English language regarding the success of the country, but resistance from certain people towards learning English came because of the colonial history and after independence there was a political desire to promote Malaya. Later, when the need to learn English was accepted by Malaysians, there aroused a