The word atom is derived from the Greek word atom which means indivisible. The Greeks concluded that matter could be broken down into particles too small to be seen. These particles were called atoms. Atoms are composed of three types of particles: protons‚ neutrons‚ and electron. Protons and neutrons are responsible for most of the atomic mass. Example; if a person weighed 150 lbs. approximately 149 lbs. and 15 ounces of that person would be comprised of protons and neutrons while only 1 ounce of
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LAB. Submitted by: BHEA MARIE MENDOZA Submitted to: -CATIONS and ANIONS- Cations are positive charged ions. A cation has fewer electrons than protons. Anions are negatively charged ions. An anion has more electron than protons. The nature and magnitude of charge on ion depend on the position of an element in the periodic table. In forming an ion‚ an atom of a main group element loses gains electrons to obtain the electronic configuration of the noble gas closest to it in the
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Qualitative Test for Some Cations I (The Silver Group) Objective: At the end of the class the student should be able to: 1. Separate‚ detect and identify the ions in a given unknown solution possibly containing the ions of the silver group. 2. Identify the substance responsible for the positive result of each test 3. Point out the suitable conditions necessary for the detection process and the reasons for such conditions Introduction Procedure: 1. 3 test tube labeled 1‚2‚3 was obtained
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Foster 1 Jason Foster Mr. Miller Physics 5 March 20‚ 2013 Energy Lost . . . Energy Saved . . . My family and many others have been tricked by the media. We have probably all – at one time or another – been succored into to buying an appliance or electrical device based off whether it’s the cheapest one. By doing this you have been fooled by society! Your purchase should not be based on price‚ but by how much energy the appliance consumes. The appliance might be cheaper‚ but it mostly
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Etymology The name atom comes from the Greek ἄτομος (atomos‚ "indivisible") from ἀ- (a-‚ "not") and τέμνω (temnō‚ "I cut")‚[3] which means uncuttable‚ or indivisible‚ something that cannot be divided further.[4] The concept of an atom as an indivisible component of matter was first proposed by early Indian and Greek philosophers. In the 18th and 19th centuries‚ chemists provided a physical basis for this idea by showing that certain substances could not be further broken down by chemical methods
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All people in this world are different. They feel differently and have different skills. Even though they have different skills‚ strengths and weaknesses‚ there will be some ones common amongst the people. Likewise‚ some of my strengths and weaknesses might be similar to that of my friends‚ parents‚ relatives‚ people around the world and some not. That is how we are made. Although‚ strengths and weaknesses isn’t a permanent thing. It can be worked on and can be improved and polished.
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he atom is the basic unit of chemical matter. The atom is the smallest unit that defines the chemical elements and their isotopes. Everything that is solid‚ liquid‚ or gas is made up of atoms. Everything that can be seen and touched is made up of atoms. Atoms are tiny; their size is typically measured in picometers (trillionths of a meter). A single strand of human hair is about one million carbon atoms wide.[1] Every atom is composed of a nucleus made of protons and neutrons (hydrogen-1 has no
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1) What are the parts of an atom? Where are the subatomic particles found? The atoms are the smallest units of matter with their own chemical characteristics. The atoms are divided into 2 parts. The first part is the central nucleus and the electron cloud. The central nucleus contains very heavy particles and the electron cloud contains very light moving particles. The subatomic particles are the protons‚ neutrons‚ and the electrons. They are located within the atom and the electrons
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safe and orderly environment; has a duration‚ frequency‚ intensity or persistence that is beyond the normal range of what schools tolerate; and is less likely to be responsive to the usual range of interventions used by the school for pupil misbehavior. The most effective methodology‚ which teachers develop when attempting to manage challenging behavior‚ is to prevent it occurring in the first place. To this end‚ many schools have developed strategies to promote positive behavior. This is based on
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Oil-Drop Experiment The Millikan Oil-Drop experiment was the first experiment to determine the charge of an electron. In 1909‚ Robert Millikan ultimately came up with a way to determine this charge through finding the minute electric charge on a droplet from an oil mist. Basically‚ Millikan started with an enclosed chamber that had two flat plates inside‚ one with a positive charge and one with a negative charge. The portion is split up by the positively charged plate so at the beginning of the experiment
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