Dmitri Mendeleev essays

Dmitri Mendeleev essays Dmitri Mendeleev was the youngest of at least 14 children in his family. They lived in Tobolosk, Siberia. His father, Ivan, was the director of a gym and his mother, Marya, came from a family that introduced glass and paper making to Siberia. Mendeleevs father died while he was still young, and Marya had to work. Luckily, her family was able to get her a managers position at the Korniliev glass factory at Aremziansk. Dmitri was educated at his fathers gym in Tobolosk, where he showed a high interest in physics and mathematics. Also, he was taught many things about glass and glass blowing from the family factory. His brother-in-law, Bessargin, taught Mendeleev about current science topics. When Mendeleev was 14, his mother had already noticed his gifted abilities in Science and wanted to help him get a good education. All that changed when the family factory burnt down. Within a few months, Dimitri's mother and sister had died from tuberculosis. Mendeleevs most significant accomplishments were his discovery of periodic law and the making of the periodic table. He had a great interest in the elements, which up to his time were distinguished by only one basic property, which had been proposed by John Dalton in 1805, that each element has a characteristic atomic weight. Mendeleev wrote the elements out on cards, atoms had their atomic weights and were set out in columns in order of atomic weight. He was unclear what to do with hydrogen, the lightest, and left it out. Scientists had identified over 60 elements by Mendeleev's time. (Today over 110 elements are known.) In Mendeleev's day the atom was considered the most basic particle of matter. The building blocks of atoms (electrons, protons, and neutrons) were discovered only later. What Mendeleev and chemists of his time could determine, however, was the atomic weight of each element: how ...

Top 10 Italian Pronunciation Mistakes

Top 10 Italian Pronunciation Mistakes    Learn to speak your best Italian by avoiding these 10 common mistakes all beginners tend to make. 1. Mumbling It might sound obvious if you want to make yourself heard, but you must open your mouth in order to speak Italian. Native English speakers, accustomed to a language that doesnt have the big, round, vowel sounds common in Italian, should remember to open wide and enunciate. 2. Consonants that Count Twice Being able to (and hear the difference, too) is imperative. The Italian language doesnt waste letters; as a phonetic language, it’s spoken the way it’s written. So if a word contains double consonants (cassa, nonno, pappa, serra), you can assume both are pronounced- the meaning changes depending on whether a particular consonant is doubled. If youre unsure how to pronounce i consonanti doppie (), try pronouncing it twice or holding it for an extra beat. 3. Third-to-Last Verbs As with most Italian words, when pronouncing the various conjugated verb forms of the stress falls on the next-to-last syllable. The one exception is the third-person plural form, in which the stress falls on the third-to-last syllable (words in which the accent falls on the third-to-last syllable are known as parole sdrucciole). 4. One in a Million Ask a beginner (or even an intermediate) Italian language learner to pronounce terms such as figlio, pagliacci, garbuglio, glielo, and consigli and often their first reaction is a look of bewilderment: the dreaded gli combination! Even the short-cut explanation that in Italian gli is pronounced like lli in the English word million often doesnt help (nor do other technical descriptions about how to pronounce gli improve the long odds of mastery). Perhaps the most effective way to learn how to pronounce gli is to listen and repeat until it becomes second nature. Remember, though, even Michelangelo was a beginner once. 5. MonDAY to FriDAY Except for Saturday and Sunday, the days of the week in Italian are pronounced with the accent on the last syllable. Theyre even written that way to remind speakers, e.g., lunedà ¬ (Monday), how to pronounce them. But too frequently, non-native speakers ignore the accent and persist in placing the accent on the first (or other) syllable. Dont shortchange the giorni feriali (workdays)- the accent marks the stressed vowel of a word in Italian. 6. On a Roll If you can relate to the following statements, it should be obvious what troubles many who are learning to speak Italian: After several years of studying Italian I’m still unable to pronounce the letter RI would very much like to learn how to roll my Rs when I speak or sing ItalianDoes anyone have any tips on how to learn to roll your Rs? No matter how good my vocabulary or accent gets, this is a dead giveaway that Im a foreigner! Learning how to pronounce the letter r is a struggle for many, but remember: rrrrruffles have rrrrridges! 7. Italian Surnames Everyone knows how to pronounce their last name, right? In fact, posts on the About.com Italian Language forums such as how do I pronounce my last name Cangialosi? are common. Since surnames are obviously a point of pride, its not hard to understand why families would insist on pronouncing them a certain way. But second- and third-generation Italian Americans who have little or no knowledge of Italian are often unaware of how to correctly pronounce their last names, resulting in anglicized versions that bear little resemblance to the original form. When in doubt, ask a native Italian. 8. Its brus-KET-ta Dont correct me when I order. Too often, wait staff at Italian-American restaurants in the U.S. (and diners as well) dont know how to pronounce the word. In Italian, there is only one way to pronounce the letter c when followed by an h- as the English k. 9. The Morning Espresso Down that small cup of very strong coffee and jump on board the fast train to make an early morning meeting. But be sure to order an espresso from the barista, since an express(o) is a train. Its a common mistake heard everywhere, even on printed signs and menus. 10. Media Misinformation Advertising is pervasive nowadays, and because of its influence, it’s a common source of difficulty in pronouncing Italian. Jingles and taglines frequently mangle Italian words and Italian pronunciation beyond recognition, and brand-naming consultants invent pseudo-Italian names for products. Imitate at your own risk.