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Investigating Periodic Trends in the Elements

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This article explores the periodic trends in the elements, including atomic radius, ionization energy, electronegativity, and others. Learn how these trends relate to the organization of the periodic table and understand their significance in predicting chemical behavior.

Investigating Periodic Trends in the Elements

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Periodic Trends

Periodic Trends. Mrs. Coyle Chemistry. Part I – Atomic Size. Atomic Radius. Measures as distance from nucleus to nucleus and divided by 2. Unit commonly used is pm picometer= 10 -12 m Example: iodine atomic radius 140pm. How does atomic radius change across a period?.

693 views • 26 slides

III. Periodic Trends

Ch. 5 - The Periodic Table. III. Periodic Trends. A. Periodic Law. When elements are arranged in order of increasing atomic #, elements with similar properties appear at regular intervals. B. Chemical Reactivity. Families or Groups- vertical

330 views • 15 slides

III. Periodic Trends (p. 140 - 154)

Ch. 5 - The Periodic Table. III. Periodic Trends (p. 140 - 154). A. Periodic Law. When elements are arranged in order of increasing atomic #, elements with similar properties appear at regular intervals. B. Chemical Reactivity. Families

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Periodic Trends

Periodic Trends. For each slide with a periodic table - copy the definition. Copy ALL of the other slides. The purpose of this exercise is for you to be able to understand 4 periodic trends and how to predict them.

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Periodic trends

Periodic trends. L. Minilab. Pg 164 Use graph paper on center counter No lab write up required Answer analysis questions on graph paper Show me completed product. Atomic Radius. Remember: e - cloud is a probability Has no defined edge Outer limit = 90% of finding an e - inside

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Periodic Trends

Periodic Trends. Elemental Properties and Patterns. The Periodic Law. Dimitri Mendeleev was the first scientist to publish an organized periodic table of the known elements.

624 views • 42 slides

Periodic Trends

Periodic Trends. Review. Where are protons located? nucleus Where are e- located? orbitals Which has greater mass? protons. Basic Idea Behind Trends. As you move across a period (left to right) OR down a group/family, characteristics of elements change consistently. Atomic Number Trend.

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Periodic Trends

Periodic Trends . Valence Electrons. Valence Electrons are electrons in the outermost energy level. - s or p electrons only (even when d and f electrons are present they are not in the outermost energy level ). Electron Dot Diagrams.

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Periodic Trends

Periodic Trends. Unit 2: Electrons &amp; Periodic Behavior. Periodic Law. When elements are arrange by increasing atomic number, there is a periodic repetition of their physical &amp; chemical properties. Periodic Trends: Atomic Radius Electronegativity Ionization Energy Metallic Character

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Periodic Trends

Periodic Trends. Two things affecting periodic behavior of atoms Distance of electrons from nucleus Attraction between the nucleus and the electrons. Trends – Atomic Size. Atomic Size is measured by Atomic Radius Trend – L to R

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Periodic Trends

Periodic Trends. Review. The elements of the P. T. are placed into: rows by the number of energy levels they have. groups by the number of valence electrons they have. blocks by what kind of sublevel they are filling. Atoms can gain or lose electrons.

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Periodic Trends

Periodic Trends. Periodic Trends Overview. For each of the four trends (atomic radius, ionization energy, reactivity, electronegativity) You need to know: Definitions of each trend Pattern of the trend (where on the periodic table is this trend the highest? The lowest?)

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Periodic Trends

Periodic Trends. Valence Electrons. Electrons in the outermost principal quantum level of an atom Electrons in the same group (vertical column) have the same valence electron configuration. Trends. Transition Metals d block Lanthanide and Actinide Series

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Periodic Trends

Periodic Trends. PreAP Chemistry. According to Bohr’s model of the atom, the nucleus and electrons are very similar to solar systems. The nucleus of an atom acts like the sun of a solar system. The positive electrical charge of the protons provides the “gravity” of the sun.

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Periodic Trends

Periodic Trends. Periodic Trends. You can use the periodic table to figure out the properties of elements The properties that change in a systematic way as you move either across a row in the periodic table or down a group are called periodic trends. Trend 1: Atomic Radii.

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Periodic Trends

Periodic Trends. Elemental Properties and Patterns. The Periodic Law. Mendeleev understood the ‘Periodic Law’ which states: When arranged by increasing atomic number , the chemical elements display a regular and repeating pattern of chemical and physical properties. The Periodic Law.

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Periodic Trends

Periodic Trends. There are many ways to use the periodic table Trends are based on electronic structure The trends we will discuss are: shielding atomic mass atomic radius ionization energy metallic character ionic radius properties of the metals and non-metals melting point.

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Periodic Trends

Periodic Trends. Ionization energy, atomic radius, ionic radius, electronegativity By Oscar Trejo Period 2. Ionization Energy (Periods). As you go across the periodic table the ionization energy increases. Boron has 800.6 and across from it nitrogen has an ionization energy of 1402.

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Periodic Trends

Periodic Trends. Usually Refers to Main Group Elements Only!. Atomic Size. As you move down a group, atomic radii increases WHY? As the number of energy levels increases, each energy level is further from the nucleus. Atomic Size. Atomic Size.

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PERIODIC TRENDS

PERIODIC TRENDS. PERIODICITY. Period Law - - physical and chemical properties of elements are a periodic function of their atomic numbers. General Periodic Trends. Atomic and ionic size Ionization energy Electron affinity, electronegativity. Effective Nuclear Charge Z*.

515 views • 31 slides

Periodic Trends

Periodic Trends. Properties that Repeat. Periodic Trends . We will begin with an inquiry activity Using the table on the notes provided, use Table B.2 in the appendix section (pg. R47) to fill in the appropriate information. Make sure you include units where applicable. Mendeleev’s Table.

401 views • 21 slides

Periodic Trends

Periodic Trends. OBJECTIVES: Interpret group trends in atomic radii, ionic radii, ionization energies, m.p., b.p., electronegativity and chemical properties. Trends in Atomic Size. First problem: Where do you start measuring from? The electron cloud doesn’t have a definite edge.

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