TRENDS IN THE PERIODIC TABLE.

Slides:

Advertisements

Similar presentations

Electron Affinity.

Advertisements

Trends in the Periodic Table

Consider the Diagram Below…

5 – 3 Electron Configuration and Periodic Properties.

NOTES ON PERIODIC TRENDS 6.1 Effective Nuclear Charge (Z eff ) – In a many-electron atom, each electron is attracted to the positively charged nucleus.

Periodic Table Trends. Metallic character Metallic Character Depends on how readily the element gives up their valence e-’s.

Drill – 11/19 What is meant by “periodic trend”?.

PERIODIC TABLE TRENDS. PERIODICITY A regular pattern in the properties of elements Also called a “TREND” Some properties are similar due to the valence.

Periodic Trends.

Periodic Table Trends. Atomic Radius As you move down a group, atomic radius increases The number of energy levels increases as you move down a group.

Graphs on the web. Atomic Radius vs Atomic Number The distance from the centre of the nucleus to the outermost electron. As the number of energy levels.

3:00 2:59 2:58 2:57 2:56 2:55 2:54 2:53 2:52 2:51 2:50 2:49 2:48 2:47 2:46 2:45 2:44 2:43 2:42 2:41 2:40 2:39 2:38 2:37 2:36 2:35 2:34 2:33 2:32 2:31 2:30.

Periodic Table Trends. (1) Atomic Radius As one goes from left to right across a period, the atomic radii decreases. Reason: All the elements in a period.

Module 3.03 Periodic Trends.

Periodic Trends. Atomic Radius Defined as half the distance between the nuclei of two atoms Going across the periodic table ◦ But why are they smaller.

Periodic Trends. Chemical Periodicity Atoms participate in chemical reactions in order to fill their outermost s and p sublevels.

Periodic Trends The physical and chemical properties of the elements are periodic functions of their atomic numbers.

Periodic Trends. Organization… When Mendeleev organized his table, he saw that ___________ showed up at regular intervals, called ________. properties.

Factors Affecting Periodicity Periodic Trends: Atomic Radius: the distance from the center of the nucleus to the outermost electron (how big an atom is)

Effective Nuclear Charge (Z eff ) – In a many-electron atom, each electron is attracted to the positively charged nucleus and repelled by the other negatively.

Periodic Properties Chapter 12 Notes. Valence Electrons Valence electrons – Electrons in the outer energy level that can be lost, gained, or shared (connected.

Periodic Trends Atomic Radius Ionic Radius Ionization Energy Electronegativity.

Periodic Trends The physical and chemical properties of the elements are periodic functions of their atomic numbers.

Periodic Trends.

Effective Nuclear Charge (Zeff)

Shielding Effect The shielding effect is the reduction of attractive force between the nucleus (+) and its outer electrons (-) due to the blocking affect.

Periodic table trends Answers

NOTES ON PERIODIC TRENDS 6.1 Effective Nuclear Charge (Zeff)

Section 6.3 Periodic Trends.

Periodic Trends.

Trends & the Periodic Table

Write the electron configuration for these elements…

NOTES ON PERIODIC TRENDS 6.1 Effective Nuclear Charge (Zeff)

Periodic Trends.

Periodic Table Trends.

Periodic Properties.

Periodic table trends Answers

Periodic Trends.

Periodic Trends OBJECTIVES:

Information we gather from the organization of the table

Decoding the Periodic Table

Periodic Trends.

Warm-up Write the abbreviated electron configurations for the elements below: 1) Chromium 2) Cesium 3) Chlorine 4) Cadmium.

Drill How many valence electrons does sulfur have?

Unit 2: Electrons & Periodic Behavior

Trends in the Periodic Table

Trends in the Periodic Table

Periodic Trends Chp 6.

Periodic Trends (2.9).

Periodic Trends.

Atomic Radii Ionic Radii Ionization Energies Electronegativity

Periodic Trends The physical and chemical properties of the elements are periodic functions of their atomic numbers.

Periodic Trends.

Periodic Trends (2.9).

Periodic Trends College Chemistry.

Periodic Trends.

TRENDS IN THE PERIODIC TABLE.

Periodic Trends How are ionization energy, electronegativity and atomic radius influenced by nuclear charge and nuclear shielding?

Periodic Trends-Patterns on the periodic table

Unit 3 Lecture 4: Periodic Table Trends

PERIODIC TRENDS.

Trends in the Periodic Table

Electron Configurations and PERIODIC TRENDS

Unit 2: Atomic Structure and the Periodic Table

Periodic Trends Atomic Number Atomic Mass Increases across a period

Periodic Table Trends.

Atomic Radii Ionic Radii Ionization Energies Electronegativity

Periodic Trends.

Trends & the Periodic Table

Periodic Trends Chemistry I.

Presentation transcript:

TRENDS IN THE PERIODIC TABLE

ATOMIC SIZE - Estimated by measuring the distance between 2 neighboring atoms

FACTORS AFFECTING ATOMIC SIZE PRINCIPAL QUANTUM NUMBER (n) OF THE VALENCE ELECTRON – the farther the valence electron is from the nucleus, the greater is the atomic size. EFFECTIVE NUCLEAR CHARGE (Zeff ) – charge “felt” by the valence electron due to the attractive force of the protons (Z) and the shielding effect (S) by the core electrons Zeff = Z - S

+1-0=+1 +2-0=+2 +4 -2=+2 +3 -2=+1

EFFECT OF CHARGE ON SIZE OF IONS

IONIZATION ENERGY (IE) - Amount of energy needed to remove an electron from an atom.

ELECTRON AFFINITY (EA) – amount of energy needed to add electrons to an atom

ELECTRONEGATIVITY – tendency of an atom to attract electrons; guided by the octet rule.