Mira's Science Blogs

https://image.slidesharecdn.com/theperiodictable-110223090122-phpapp01/95/the-periodic-table-7-728.jpg?cb=1298451775 Summary: This week, we have been learning about how the periodic table is arranged and the different patterns that are in the rows  and columns. In the periodic table, the rows are called periods. Along the rows, the elements are organized by atomic number (the number of protons.) The rows also have the same energy level or the number of electrons. For example, in the first row, all of the elements' atoms have one energy level, and so on.The atomic mass is the number of neutrons plus the number of protons. The atomic mass can be a decimal, and it is ordered increasingly. The columns in the periodic table are called groups or families. Each family has a name. For example, group one is composed of alkali metals which is the family with Lithium, Sodium, and more. Each group also has the same number of outer, or valence electrons. The elements in group one ...

Dear friends of the National Science Foundation, I have heard that you are having difficulties understanding my friend, Dmitri Mendeleev's work with the periodic table of elements. In this letter, I will help you understand and learn about Mendeleev and his findings. I can try to help explain how various different patterns and different proof to show you why Dmitri Mendeleev is accurate, and his findings are correct. At the end of this letter, I hope you will make the best decision whether to shut him down. First, I will give you a little background about his life so that you can see how much trouble has gone into his work. Dmitri Mendeleev was born in 1834. He was the youngest in his family. When he was young, his father went blind. His mother's glass factory burned down. Even with all of these misfortunes, his mother was determined that he had to get the best education, so they traveled to St. Petersburg. Just a little bit later, his mother died of tuberculosis, and more of...

https://www.livescience.com/28507-element-groups.html Summary: This week we learned about the different families and groups of the periodic table and how they are classified. The periodic table is organized by the increasing atomic number or the number of protons. When you look at the periodic table, you can see that to the right, there is a "staircase." The elements that make up the staircase are metalloids, which are both metals and non-metals. Everything to the left of the staircase is a metal, and everything to the right is a non-metal. Rows of the periodic table are called periods. The elements in a row have different chemical properties. However, in a row, there are the same energy levels. The columns, or "families" in the table have similar chemical & physical properties because they have the same number of outer electrons.These are called "families" because they are all similar, but not all the same element.  There are 8 groups...

https://qph.ec.quoracdn.net/main-qimg-4c093d923cef8c8e3752f2f7a7f40450 Summary: This week, we learned about elements, ions, and isotopes. You have probably heard of the periodic table of elements. Elements are the alphabet to the language of molecules. Another way to think about it is that they are the building blocks to matter. How can you learn about a specific element by looking at it on the periodic table of elements? There are 4 important properties of an element on the periodic table. The atomic number displays the number of protons. Then, there is the element symbol, which is an abbreviation of the element name. This symbol has no numbers and is never more than two characters. There is the atomic mass or weight, which has the number of protons and neutrons, and finally is the element name, simply the name of the element. Ions are atoms that have lost or gained electrons. If they have lost electrons, they are called cations. Cations are positive because they have l...

Dear King Author, I understand that you have lost your golden crown. Five other crowns were discovered and you need help finding out which crown was your original crown. I have figured out which crown is pure gold. Crown #4, recovered by Gawain, is pure gold. In this letter, I will tell you how I have got to this conclusion. I figured out which crown is pure gold using density. Density is the amount of "stuff," or mass that is is a certain "space," or volume. To figure out the density of a material, it is mass divided by volume. The measurements for mass and volume are grams and centimeters, so the mathematical equation is g/cm 3   . For each of the crowns, I used this mathematical calculation. I found the mass of each crown and divided it by the volume, 180 cm 3 . Once I got the density of each of the crowns, I referred back to the chart that you offered to me. I matched up the density of the crowns with the density of the common substances. I figured out that ...

https://d2gne97vdumgn3.cloudfront.net/api/file/bVWcSARQTSUVCLi1bfgc Summary: Structure of an Atom: Atoms are composed of protons (positive charge), neutrons (neutral charge), and electrons (negative charge). The inner part of the atom is called the nucleus. The nucleus has protons and neutrons. The outer part or the shell that moves around the nucleus is composed of electrons.  How big is the nucleus? If the atom was the size of a football stadium, the nucleus would be the size of a marble. Between the nucleus and the shell, there is space.  Solids, Liquids, and Gases How can you tell if something is a solid, liquid, or a gas based on how the atoms move around?  When an object is solid, the atoms vibrate in one position, they are not free to move around. An example of this would be a penny. The atoms in a liquid, move around, but they stay close and move slowly. A liquid example would be water or orange juice. In a gas, atoms move around fast and they a...