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• What are Isotopes? | Chemistry | FuseSchool
What are Isotopes? Find out in this video from the Properties of Matter chapter. 00:00:02,590 -- 00:00:07,319 In a previous video we learnt about Isotopes. Here are a few more examples. 00:00:07,319 -- 00:00:14,319 There are two isotopic forms of Chlorine: Chlorine 35 and Chlorine 37. Remember isotopes 00:00:16,910 -- 00:00:21,869 have the SAME number of protons, but a different number of neutrons. So how 00:00:21,869 -- 00:00:27,090 many neutrons are in each of these isotopic forms of Chlorine? 00:00:27,090 -- 00:00:30,980 Remember: Mass Number = Number of Protons + Number of 00:00:30,980 -- 00:00:34,030 Neutrons. And the number of protons for each isotope forms 00:00:34,030 -- 00:00:39,960 of elements is the same, so we can rearrange this formula to calculate the number of neutrons 00:00:39,960 -- 00:00:44,969 in each form. Neutrons = Mass Number - Protons 00:00:44,969 -- 00:00:51,969 When we look at Chlorine on the periodic table it has an atomic number of 17, therefore it 00:00:55,149 -- 00:00:59,860 has 17 protons. So Chlorine-35 has a mass of 35. 00:00:59,860 -- 00:01:04,480 Neutrons = Mass Number - Protons = 35 -17 00:01:04,480 -- 00:01:06,909 = 18 18 neutrons 00:01:06,909 -- 00:01:13,909 So Chlorine-37 has a mass of 37. Neutrons = Mass Number - Protons 00:01:15,360 -- 00:01:18,929 = 37 -17 = 20 00:01:18,929 -- 00:01:24,590 20 neutrons. So Chlorine-35 has 18 neutrons and Chlorine 00:01:24,590 -- 00:01:25,999 37 has 20 neutrons. 00:01:25,999 -- 00:01:32,999 Another example of an isotope is Lithium. Lithium has two stable isotopic forms. 00:01:33,340 -- 00:01:38,619 The atomic number of Lithium is 3, therefore it has 3 protons. 00:01:38,619 -- 00:01:43,450 The isotopes of Lithium have 3 neutrons and 4 neutrons respectively. 00:01:43,450 -- 00:01:48,729 How do we calculate each of the isotopes mass number? 00:01:48,729 -- 00:01:52,349 Remember, Mass Number = Number of Protons + Number of 00:01:52,349 -- 00:01:56,209 Neutrons. So for one isotopic form the mass number would 00:01:56,209 -- 00:02:00,059 be: 3 + 3 = 6 00:02:00,059 -- 00:02:04,489 So we would have Li-6 And for the other form, the mass number would 00:02:04,489 -- 00:02:05,599 be 3+4 = 7 00:02:05,599 -- 00:02:09,580 So we would have Li- 7 Want to learn more? Visit: www.fuseschool.org This video is distributed under a Creative Commons License: Attribution-NonCommercial-NoDerivs CC BY-NC-ND
• Plant Structure - (Information + Fun Facts) - Science4Fun
Plants are the beauty of nature. They look very beautiful and gives us fresh oxygen. There are many types of the plants on the Earth including flowering plants
• Plant Structure - (Information + Fun Facts) - Science4Fun
Plants are the beauty of nature. They look very beautiful and gives us fresh oxygen. There are many types of the plants on the Earth including flowering plants
• Inside The Digestive System
'The Journey of the Digestive System' by National Geographic
• Science: Biology for Kids
Kids learn about all sorts of biology subjects including the cell, animals, plants, the human body, genes, inheritance, diseases, and microorganisms.
• How Evolution works
The mechanisms of evolution explained in one video.
• Life Before Birth - In the Womb
A great video about life in the womb
• 12. Static Electricity
from thephysicsteacher.ie
• The Electron: Crash Course Chemistry #5
Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table. Crash Course on the internet! http://www.facebook.com/YouTubeCrashCourse http://www.twitter.com/TheCrashCourse http://TheCrashCourse.tumblr.com Table of Contents Snobby Scientists 00:43 Great Dane/Bohr Model 01:57 Electrons as Music 04:13 Electron Shells and Orbitals 04:44 Electron Configurations 05:54 Ionization and Electron Affinities 08:17 Periodic Table 10:18 Support CrashCourse on Subbable: http://subbable.com/crashcourse
• The Periodic Table: Crash Course Chemistry #4
• Bell in a Bell Jar
A bell can be heard ringing within a bell jar. The bell jar is connected to a vacuum pump and the air is slowly removed. Once a vacuum has been achieved the pumped is turned off and air is allowed to slowly re-enter the bell jar.
• Pollution: Crash Course Ecology #11
Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.
• Pollution: Crash Course Ecology #11
Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.
• The NEW Periodic Table Song (Updated)
• Blood - What Is Blood - Primary Functions Of Blood
In this video I discuss what is blood, the primary functions of blood, and what is blood made of. I also discuss the components of blood, what does blood do, and the functions of blood cells. Transcript What is blood? Well, blood is made up of 4 major components, plasma, red blood cells, white blood cells, and platelets. Plasma makes up about 50 to 55% of blood, and its main contents include, about 90% water, glucose, hormones, enzymes, proteins, minerals and various waste products like carbon dioxide. Red blood cells make up about 45 to 50% of blood, and their primary function is to carry oxygen to cells and deliver carbon dioxide to lungs. White blood cells make up 1-2% of blood, and they help protect the body against disease and invaders. Platelets make up 1 to 2% of blood, and they are involved in clotting and help prevent bleeding. Blood has 3 major functions in the body. 1. Transportation Blood transports oxygen and other various nutrients to cells throughout the body, it also carries waste products and carbon dioxide to the kidneys and lungs for removal from the body. 2. Protection Blood carries white blood cells which fight infections that threaten to damage the body. 3. Regulation Blood regulates body temperature, as well as ph balance. Other sources... http://www.medicalnewstoday.com/articles/196001.php
• Circulatory System - Cardiovascular System - Path Of Blood Flow
In this video I discuss the circulatory system or cardiovascular system, the functions of the cardiovascular system and the path of blood flow through the heart and components of the cardiovascular system. Transcript (partial with notes) The circulatory system is responsible for transporting nutrients, such as, hormones, water, oxygen and other nutrients to and from virtually all cells throughout the body. It also carries away carbon dioxide and other waste materials produced by cells. The cardiovascular system is made up of the heart, vessels, which include arteries, veins and capillaries. Let’s look at the path of nutrients though the body… 1st, Oxygen is absorbed in the lungs, where it enters the bloodstream and goes to the heart, which pumps it into arteries. Arteries take the oxygenated material to organs and tissues, where they merge into capillaries. Many capillaries enter tissue to form a capillary bed. The oxygenated material drops off its nutrients, and collects waste materials such as carbon dioxide. This deoxygenated waste continues through the capillary which merge into veins. The veins then take the waste to the heart, which pumps it back to the lungs where it can get oxygenated again.