Anions and Cations in Biological Systems Essay Example | Topics and Well Written Essays - 5000 words

Anions and Cations in Biological Systems - Essay Example However, the boundary of 2s has a spherical surface around the nucleus and another spherical shell around the nucleus. Thus there is a node between the two spherical surfaces describing 2s surface while just one spherical surface describes 1s orbital. Q3. The probability distribution function is obtained by multiplying the square of the wave function with 4ï  °r2. Even though the radial part of the wave function is maximum at r = 0; the value of the probability distribution function will be zero only as r = 0. Thus the maximum probability of finding an electron can be at some other value of r; even though the wave function has its maximum value at r = 0. Thus it can be seen that there is no contradiction in probability of finding an electron being maximum at r = 0.529 A and value of the corresponding wave function being maximum at r = 0. Hence the two statements are compatible. Q4. This is because alkali metals are multi electron system unlike hydrogen, which is one electron system. Therefore, in case of hydrogen only electron – nucleus interaction is there and the atomic spectrum of hydrogen is due to electronic transition of just one electron across different excitation states. In case of alkali metals, there being many electrons, there exists interaction among electrons as well besides the electron – nucleus interaction. Further there are many more excitation states and electronic transitions in case of alkali metals (because of many electrons being there) than in case of hydrogen atom. Therefore, the atomic spectrum of an alkali metal is much more complex than that of hydrogen. Q7. First ionization energy of an atom is the value of energy required to pull out the outermost electron from the atom. Its value increases as one traverse from left to right in a period of the periodic table. This is because as one moves from left to right in a period the number of protons I the

Reading and lives Essay Example | Topics and Well Written Essays - 1250 words

Reading and lives - Essay Example In my own opinion, I also think reading and writing have some benefits in our lives. For example, people can learn new knowledge to enrich their lives. Even though, people might have different cultural background, reading and writing can also help them change their lives and help them get better. As such, the main idea going to be presented in this paper is related to the aspect of how reading and writing can transform our lives. To a certain extent, reading can be viewed as a hobby but it can help people change their destiny. In addition, a good study environment can help people develop a habit of reading. In the article, â€Å"The Joy of Reading and Writing: Superman and Me† by Sherman Alexie, it can be noted that his father liked to buy books which meant that Alexie had many books to read. When he was young, he did not know a lot of words. Consequently, Alexie improved his vocabulary through reading a lot of books. For example, when he read Superman, a comic book, he assumed some words or dialogue that Superman could say to help him read the book. I think that it is a good and easy way to help people to understand books. On the other hand, Alexie said that some people thought that Indian children were expected to fail in the non-Indian world. However, he did not agree with that argument. Instead, he refused to be a failure. Alexie spent a lot of time reading, even just for a few minutes. In additio n, Alexie read a book everywhere, in the car, shopping mall and bookstores (50 Essays 15-18). Finally, he became a writer and he wrote novels, short stories and poems. From Alexie’s experience, I believe that reading is the cornerstone that helps people to develop their talents. Some people have different opinions of other individuals who come from other countries. In the article mentioned above, Alexie is portrayed as an Indian child. He mentions that his classmates who