63 64 65 Relative mass /m/e 2M Species protons neutrons Electrons 20 Ne 10 10 10 10 16 O2- 8 8 8 10
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on the planet earth. Electrons are small little particles that when moving create what we call electricity. Electricity can be found almost anywhere including our very own bodies. This type of electricity is called electrical current. Electrical current is electricity that moves. A current happens when electrons move through things. Another type of electricity is called static electricity. This happens when electrons collect together in objects. This collection of electrons gives the object a charge
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particles that make up atoms are protons‚ neutrons‚ and electrons. 2. Why do all isotopes of an element have the same chemical properties? In what way do isotopes of an element differ? An isotope has the same number of protons but a different number of neutrons in the nucleus. 3. What is a covalent bond? An ionic bond? An ionic bond is formed when one or more electrons are transferred from one atom to another. Covalent bond forms when electrons are shared between atoms. 4. What is a compound
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hydrogen. When an ionic compound forms‚ the anion transfers an electron to the cation which creates an electrostatic bond and an electrically neutral compound. Also‚ they readily dissolve in aqueous solutions and are good conductors of heat and electricity. Further‚ ionic compounds can be classified as either strong conductors or weak conductors. In contrast‚ molecular compounds are formed from non-metals. Molecular compounds share electrons between atoms forming a covalent bond. In general‚ molecular
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Bonding Section 3.3 Electron Configurations and Periodic Trends (pg. 139-157) Feb. 11 For single electron system all orbitals with the same value of have the same energy Atoms with more than 1 electron with the same value of n have different energies (sublevels) Because of interactions between additional electrons All orbitals within a sublevel have the same energy The Fourth Quantum Number: A property of the electron (spin quantum number: ms) Describes property of the electron that results from
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break them apart. The weak force is behind the processes of radioactive decay‚ when an unstable nucleus splits into two or more pieces. One important process in particular it is responsible for is beta decay. This happens when a neutron emits an electron and transforms itself into a proton‚ changing the atom into another element. The weak force thus demonstrates itself primarily through changes in particle identity‚ rather than particle motions. While the strength of the weak force is
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Mass Stopped by Alpha 2 protons 2 neutrons +2 Large Paper Beta Electron formed with neutron inside -1 Small Aluminum Gamma Electromagnetic wave 0 Tiny Lead 4) Open folder ‘ionisation’ and watch the video. Look closely at the particles emitted by the source at the end of the animation - what type of emission is this? Explain how these particles can cause an electric current to travel through air. An electron will be taken from the surface which is attracted to the positive plate
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Bond Length is the minimal distance between the two atoms. Covalent Bonding is when atoms “share” electrons in order for both of the outer shells are completed. Covalent Bonding is done by two or more nonmetals bonding with each other. Polar covalent bonds are done by more that one type of atom Electronegativity Electronegativity is the ability of an atom in a molecule to attract shared electrons to itself. It depends on the bond energy of the two different atoms. Bond Polarity and Dipole Movements
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Kevin Li Mrs. Baldwin Honors Chemistry 3 November 2012 Historical Development of Atomic Structure Over the many years of the world’s history‚ there have been numerous developments and discoveries pertaining to atomic structure. Each of these breakthroughs gradually led us—step by step—to a deeper understanding of what makes up each and every atom. Because of this‚ our perception of an atom’s structure today is vastly different from the first idea of an atom’s structure from many centuries
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non-covalent bonding. Covalent bonding involves the pairing of electrons that are shared between atoms‚ whereas non-covalent bonding involves the attraction of electromagnetic forces between atoms. Covalent bonds are strong and non-covalent bonds are weak. Both covalent and non-covalent bonds relate in a sense of stability as covalent bonds are most stable when its outmost electron shell filled‚ typically octet (or eight electrons)‚ and non-covalent bonds are stable when they have a strong electronegativity
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