Presentation on theme: "Chapter 1: Atomic Structure and the Periodic Table"— Presentation transcript:
1 Chapter 1: Atomic Structure and the Periodic Table Section 1.1: Atoms are the smallest form of elements
2 All matter is made of atoms Are all substances we touch the same?Example: A book is made of a different _________ then air.First it was thought everything was made of:Air, ______, fire, and earthToday chemists know about ____ basic substances, or _________, account for everything we see or touch.Element is related to the word “elementary” which means “______”
3 Types of Atoms in Earth’s Crust and Living Things
4 Types of Atoms in Earth’s Crust and Living Things
5 Names and Symbols of Elements Where do these names come from?People, ______, and Greek wordsSymbolsFirst Letter of Its NameHydrogen ___Sulfur ___Carbon ___First Letter Plus One More LetterAluminum ____Platinum ____Zinc ____
6 Names and Symbols of Elements (cont.) Some symbol names are less obvious.Symbols from Latin NameGold ____Lead ____Iron ____Copper ____
7 Each Element is Made of Different Atoms Dalton was the first to propose that each ________ is made of tiny particles called ______.Atoms are made of even smaller particles________
8 The Atomic Model____________________________________________
9 The Structure of an Atom ProtonA __________ charged particle located in an atom’s nucleus.NeutronA particle that has __________ charge and is located in an atom’s nucleus.NucleusThe central region of an atom where most of the atom’s mass is found in ________________.**THE ___________ HAS AN OVERALL POSITIVE CHARGE**
10 The Structure of an Atom ElectronA ___________ charged particle located outside an atom’s nucleus.An electron is about ______ times smaller than either a proton or neutron.**The ______________ has a negative charge** Neutral atoms have no electrical charge because they have the ______ number of _______ as _________.
11 Atomic Number The number of _______ in the nucleus of an atom. This determines the ______ of an atom.Ex. Every hydrogen atom has an _______________ of 1, it has exactly one proton in its nucleus.
12 Atomic Mass NumberThe total number of _______ and ________ in an atom’s nucleus.Atoms of a certain element always have the same number of ______, but may not always have the same number of ________.So, not all atoms of an ________ have the same atomic mass number.What are these atoms called????
13 IsotopesAtoms of the same element that have a _________ number of ________.Ex. All chlorine atoms have 17 protons. However, some chlorine atoms have 18 neutrons, while other chlorine atoms have 20 neutrons.Some elements have many ________, while others just have a ____.
14 Atoms Form IonsAn ____ is formed when an atom ______ or ______ one or more ________.The number of ________ in an ion is _________ from the number of ________.An ion ____ have an overall electric charge.
15 Formation of a Positive Ion A ______ ion is formed when an atom ______ an electron.A positive ion is ______ than the atom that formed it because it has ______ electrons.Positive ions are represented by the symbol for the element with a raised ____ sign to indicate a positive _______.Ex.
16 Formation of a Negative Ion A _______ ion is formed when an atom ______ an electron.A negative ion is ______ than the atom that formed it because it has _____ electrons.Negative ions are represented by the symbol for the element with a raised _____ sign to indicate a ________ charge.Ex.