Counting Atoms 4/9/17
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Summary: A covalent bond is a bond that forms when atoms are sharing electrons. Covalent bonds occur with non metals. Fun fact, when the atoms are apart the electrons are traveling all around, but when they are close they stay in between the two nuclei. When the atoms form a covalent bond and are together the potential energy lowers and the atoms are more stable. In order to form a covalent bond both atoms need a strong enough attraction and they need the room for the electrons in their outer shell.A positive ion is an atom that has lost one or more electrons giving it a positive charge. A negative ion is an atom that has gained one or more electrons giving it a negative charge. To form an ionic compound you need both a positive and negative ion. Metals have a tendency to lose electrons to form a positive ion, while non metals normally gain electrons to form a negative ion. An ionic bond forms between a metal and a nonmetal. An ionic bond is held together by the attraction between opposite charges. Ionic bonds are when electrons are transferred between atoms while covalent bonds share electrons.
XCC-Cause & Effect: Chemical reactions are represented by a chemical equation. Chemical equations are balanced on both sides. This means that there are the same number of each atom before and after the reaction. The Law of Conservation of Mass says that atoms can not be created or destroyed in a chemical reaction. The only thing that changes is the arrangement and combination of atoms not how many. Reactions occur when two or more molecules interact with one another. Bonds between atoms can be broken to form new rearrangements. What about covalent bonds? The attraction of two atoms is what pulls them together. In the space between their nuclei they share their electrons which makes it a covalent bond. As for an ionic bond, The attraction pulls them together too. In this instance though, one has a stronger attraction and takes the others electron. Chemical reactions happen when two molecules are together while ionic and covalent bonds start with an attraction or pull.
Multiplier: This week I was a mutant to be more specific a creator because I offered to do as much as possible when doing the experiment.
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| Middle School Chemistry |
Summary: A covalent bond is a bond that forms when atoms are sharing electrons. Covalent bonds occur with non metals. Fun fact, when the atoms are apart the electrons are traveling all around, but when they are close they stay in between the two nuclei. When the atoms form a covalent bond and are together the potential energy lowers and the atoms are more stable. In order to form a covalent bond both atoms need a strong enough attraction and they need the room for the electrons in their outer shell.A positive ion is an atom that has lost one or more electrons giving it a positive charge. A negative ion is an atom that has gained one or more electrons giving it a negative charge. To form an ionic compound you need both a positive and negative ion. Metals have a tendency to lose electrons to form a positive ion, while non metals normally gain electrons to form a negative ion. An ionic bond forms between a metal and a nonmetal. An ionic bond is held together by the attraction between opposite charges. Ionic bonds are when electrons are transferred between atoms while covalent bonds share electrons.
S&EP-Using Mathematics: You can see chemical formula's that have reactants that yield a product, but most people do not take the time to count how many atoms there are in each compound or molecule. There are different ways to count atoms depending on what it is and how it is written. Let's take CaCO3. We can tell there are at least three atoms because there are three capitol letters. The subscript or small number tells you how many of the atom there is of the one before it. SO in this case, there is three oxygen atoms. Since there are no other subscripts and there are no coefficients I can tell there is one calcium atoms, one carbon atom, and 3 oxygen atoms to make a total of five atoms. What if there is a coefficient? Let's try another one, 3CO2. We follow the process of the distributive property with the coefficient. In other words, it is multiplied by either the subscript or one depending on the formula. For this example, we have at least two atoms because there are two capitol letters. Since there is no subscript for carbon, we multiply three by one to get three. As for the oxygen atom, it does have a subscript of two so you multiply three by two to get six. In total that compound has nine atoms. This lesson was very useful and I can see how math and science are so intertwined.
XCC-Cause & Effect: Chemical reactions are represented by a chemical equation. Chemical equations are balanced on both sides. This means that there are the same number of each atom before and after the reaction. The Law of Conservation of Mass says that atoms can not be created or destroyed in a chemical reaction. The only thing that changes is the arrangement and combination of atoms not how many. Reactions occur when two or more molecules interact with one another. Bonds between atoms can be broken to form new rearrangements. What about covalent bonds? The attraction of two atoms is what pulls them together. In the space between their nuclei they share their electrons which makes it a covalent bond. As for an ionic bond, The attraction pulls them together too. In this instance though, one has a stronger attraction and takes the others electron. Chemical reactions happen when two molecules are together while ionic and covalent bonds start with an attraction or pull.
Multiplier: This week I was a mutant to be more specific a creator because I offered to do as much as possible when doing the experiment.
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