III) Methods and Materials To test my hypothesis, I used four individual glow sticks, which was my independent variable. Two of the glow sticks were green, whereas the remaining two were red. However, in order to test the effect of bright colors against dull colors, I wrapped one green and one red glow stick in wax paper in order to make their colors dull, and left the other two unwrapped to give off a brighter color. I conducted one trial per glow stick, ending with four trials in total. I also
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Determination of the Reaction Rate of Mg and HCl Alex Skartvedt Alex Skartvedt, Melanie Ho, Christina Olson, Thor Swerdykiak November 11, 2015 Fall 2015 Semester Abstract: The experimental rate law of the reaction: 2HCl(aq)+Mg(s)→MgCl2(aq)+H2(g) is being determined because kinetics play a large role in the reactions happening in everyday life. The rate law, k value will be obtained in the experiment. To obtain the information a pressure probe was connected to an Erlenmeyer flask in
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As you move down group 1 on the periodic table the atoms get more reactive. As you go down a group the atoms get bigger and bigger this makes it easier for atoms to lose their electrons. The metals react more vigorously with water as you go down the group. Lithium is at the top of the group and when it’s added with water its gets fizzy, floats and moves around the bowl as a gas is given off. When sodium is added with water it moves faster around the bowl, and it turns in to ball and a gas is given
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Lithium: Lithium is the third element on the periodic table which makes its atomic number three. The symbol that is associated with lithium is Li as shown in the spelling of my first name. The atomic mass of lithium is approximately seven. Since the number of protons and electrons are equal to the atomic number, they equal three for lithium. The number of neutrons in lithium equals four. Lithium is a light, silver-white metal which therefore makes it a solid. After the mineral it is in is heated
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This lab report identified different types of reactions in various chemical changes. Through the five experiments completed in class, the creation of bubbles indicating a new gas formed, colour change, and production of light were observed. From reactions A and B, it can be concluded that single displacement reactions are indicated when three elements are present, two of which are of like charges that switch places during the chemical reaction. Both reactions involved an element with a negative charge
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order of increasing atomic number with both their chemical and physical properties showing a periodic pattern. Students through carrying of laboratory experiments discover these properties of elements in the periodic table. Major properties to be examined are first ionization energy, atomic radius, physical and chemical properties. Purpose To understand periodic trends as it relates to atomic radius, first ionization energy, physical and chemical properties of elements. Equipments and Materials
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freshman year of college I took the first step of my half-hearted plan to pursue a career in medicine: enrolling in General Chemistry. Through my weekly allotted hours in lab, I realized the crucial role the environment plays in bringing about certain chemical reactions. This importance extends far beyond the controlled setting of a college laboratory, in which it seems even the air pressure is finely-tuned. For instance, the tarnished silver of the pendant which sits atop my neck is a pro duct of the
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Since the 1960s chemical castration has been widely embraced by the correctional justice system as a form of punishment and treatment for sex offenders. Offenders are treated with injections of a synthetic hormone that is used to lower their testosterone level, resulting in a decrease in their sexual drive. The change in sexual behavior is believed to have promising effects preventing the offender from relapsing into committing harm again. Although the drug is an accepted use of treatment there is
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sometimes known as Protium or just hydrogen, hydrogen-2, also known as Deuterium and finally Hydrogen-3, which is also known as Tritium. Although each isotope has a different number of neutrons; 0, 1 and 2, respectively. This has no impact on their chemical properties. But, it does however affect the physical properties. Namely their mass. Whereas Hydrogen-1 has an atomic mass of 1amu, Hydrogen-2 has an atomic mass of 2, due to the presence of a neutron in addition to the proton within the nucleus.
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elements that make up living cells. A Nitrogen atom has protons and neutron in the central nucleus with two electrons on the inside and four electrons on the outside. Electrons on the outer shell will interact electrons of atoms to determine the chemical properties of atoms. Nitrogen-15 isotopes neutrons vary unlike the Nitrogen atom. The fifteen stands for the atomic weight, seven protons and eight neutrons. The Nitrogen Ion has varying numbers of electron. An Ion charge is determined by its name
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