ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

Slides:

Advertisements

Similar presentations

Atoms Chapter 2, Section 1.

Advertisements

 Matter is anything that occupies space.  All matter is made of atoms.  Atoms are the building blocks of matter.

The History of Atomic Theory

Atomic Structure: Isotopes and Ions. Isotopes  The number of protons for a given atom never changes.  The number of neutrons can change.  Two atoms.

Matter & The Atom. Matter The term matter describes all of the physical substances around us Matter is anything that has mass and takes up space The Universe.

Matter & The Atom. Matter The term matter describes all of the physical substances around us Matter is anything that has mass and takes up space The Universe.

Atoms w What are atoms? w What’s in them? w Why are they important? w Can you combine them?

Matter & The Atom. Matter The term matter describes all of the physical substances around us: your table, your body and a pencil Anything that has mass.

Investigating Atoms and Atomic Theory Students should be able to: – Describe the particle theory of matter. PS.2a – Use the Bohr model to differentiate.

Matter & The Atom. Matter The term matter describes all of the physical substances around us Matter is anything that has mass and takes up space The Universe.

ATOMS, IONS AND ISOTOPES…OH, MY!. ATOMS Smallest part of matter Made of proton (+) Neutron (neutral/0) Electron (-)

Notes: Matter Atoms, Periodic Table of Elements, Ions, and Isotopes.

The Structure of Atoms The structure of atoms The parts of an atom Atoms are made of several types of tiny particles. The number of each of these particles.

Atomic Models This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in.

ATOMIC STRUCTURE.

Section 2 Protons, neutrons, and electrons- how atoms differ

Investigating Atoms and Atomic Theory

The Atomic Theory The smallest particle of an element that can enter into chemical change. 2. Building block of all matter. 3. Consists of a central nucleus.

ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

Structure of an Atom & The Charge of An Atom

Atomic Structure.

Matter & The Atom.

Matter & The Atom.

Matter & The Atom.

What does an atom look like?

What are the parts of an atom?

ELEMENTS, IONS AND ISOTOPES

Atomic Structure – Chapter 4

The History of the Atom.

Important Terms ATOM - Smallest unit of an element that keeps its chemical properties ELEMENT – Unique substance with the same number of protons in every.

Atoms Once believed to be the smallest particles that made up matter

Atomic Structure February 23 & 24.

From the Desk of OnyangoNgoye For Form One term three.

Chapter 11 Lesson 2 The Structure of Atoms

Bell Ringer What is the smallest part of a living thing (You learned this last year)?

Atom p. 88 The smallest unit of an element How small are they?

Valence Electrons & Bohr Diagrams

Atoms Atomic Structure.

Warm Up What can you infer about these three objects?

Atomic Number Atomic Mass

From the Desk of OnyangoNgoye For Form One term three.

The History of Atomic Theory

Investigating Atoms and Atomic Theory

Atomic Structure Most of the mass of an atom is concentrated in an extremely small, dense, and positively charges core called the nucleus The nucleus contains.

Foldables: Atoms Terms.

Unit 1 Vocabulary Atom – smallest particle of an element that maintains the properties of that element Atomic mass – average mass of one atom of an element.

A Model for the Electrical Nature of Matter

A Model for the Electrical Nature of Matter

The History of Atomic Theory

The Bohr Model.

Atomic Structure Protons- positively charged, found in nucleus

Atomic Structure.

ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

Warm Up (11/3) What do atoms make up?

Structure of the Atom Nucleus- Protons Neutrons Electrons-

ATOMS AND ATOMIC STRUCTURE

Structure of the Atom Describe the structure and arrangement of atomic particles. Characterize and classify elements based on their atomic structure.

Intro to Chemistry Atoms Smallest whole particle of matter

10T2K© Atoms and bonds.

Do Now Write the following definitions: Proton: Neutron: Electron:

ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

Investigating Atoms and Atomic Theory

Example Example 1: The atom of an element has a mass number of 214 and an atomic number of 82. a) How many protons and neutrons does it have? The number.

Presentation transcript:

ATOMS AND ATOMIC STRUCTURE Atom Nucleus Proton Neutron Electron

The smallest unit of an element. WHAT IS AN ATOM? The smallest unit of an element. Consists of a central nucleus surrounded by one or more electrons.

The central part of an atom. Composed of protons and neutrons. WHAT IS THE NUCLEUS? The central part of an atom. Composed of protons and neutrons. Contains most of an atom's mass.

Positively charged particle. WHAT IS A PROTON? Positively charged particle. Found within an atomic nucleus.

Found within an atomic nucleus. WHAT IS A NEUTRON? Uncharged particle. Found within an atomic nucleus.

Negatively charged particle. WHAT IS AN ELECTRON? Negatively charged particle. Located in shells that surround an atom's nucleus.

Electron Cloud !!!

Electron Cloud: A space in which electrons are likely to be found. Electrons whirl and revolving about the nucleus billions of times in one second Location of electrons depends upon how much energy the electron has.

Electron Cloud: Electrons with the lowest energy are found in the energy level closest to the nucleus Electrons with the highest energy are found in the outermost energy levels, farther from the nucleus.

Bohr Model In 1913, the Danish scientist Niels Bohr proposed his model, he placed each electron in a specific energy level.

Bohr Model According to Bohr’s atomic model, electrons move in definite orbits around the nucleus, much like planets circle the sun. These orbits, or energy levels, are located at certain distances from the nucleus.

Atomic Structure

Atomic Number = number of protons Describing Atoms Atomic Number = number of protons In a neutral atom, the # of protons = the # of electrons Atomic Mass= the number of protons + the number of neutrons

Isotopes The number of protons for a given atom never changes. The number of neutrons can change. Two atoms with different numbers of neutrons are called isotopes Isotopes have the same atomic # Isotopes have different atomic Mass #’s

Isotopes

Ions An atom that carries an electrical charge is called an ion If the atom loses electrons, the atom becomes positively charged (because the number of positively charged protons will be more the number of electrons) If the atom gains electrons, the atom becomes negatively charged (because there are more negative charges than positive)

Ions The number of protons does not change in an ion. The number of neutrons does not change in an ion. So, both the atomic number and the atomic mass remain the same.

Ions This atom has lost an electron. Now it has one more proton than electron. One more proton means one more positive charge. This makes the total charge of the atom POSITIVE. This atom has gained an electron. Now it has one less proton than electron. One less proton means one less positive charge. This makes the total charge of the atom NEGATIVE.