3-3 Modern Atomic Theory By Ms. Pacheco. Parts of the Atom NAMECHARGEMASSLOCATION Proton Neutron Electron.

Slides:

Advertisements

Similar presentations

Isotope Notation Isotope Notation uses a symbol to convey information about an isotope of a particular element. 23 Na 11.

Advertisements

Inside an Atom.

Atomic Number, Mass Number, Atomic Mass and Isotopes Mrs. Coyle Chemistry.

Subatomic Particles Atomic Number | Isotopes | Ions.

Atomic Structure Section The Nucleus Nucleus- contains most of the mass of an atom – Protons & Neutrons contains most of an atom’s mass – Electrons-

Atomic Structure Nucleus – contains protons and neutrons

Atomic Mass & Number Isotopes The Periodic Table.

Inside the Atom.

The Atom & the Periodic Table. Reading the Periodic Table.

Subatomic Particles and Isotopes. Subatomic Particles Protons- Positively Charged Protons- Positively Charged Located in the nucleus Located in the nucleus.

Atomic Structure.

Objectives:  1. Name and describe the three subatomic particles in an atom.  2. Determine the number of protons, neutrons, and electrons in an atom or.

Atom P’s, N’s and e’s oh please!!. Two regions Nucleus and the electron cloud. The nucleus in located in the center of the atom with an overall positive.

Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.

Reading the Periodic Table. The top number is the atomic number or the number of ______________________ Cl is an abbreviation for ______________________.

Determining the number of subatomic particles in an atom.

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.

Ch. 11 Section 2 The Atom. Vocabulary To Know  Proton- subatomic particle that has a positive charge and that is found in the nucleus  Atomic mass unit-

IONS and ISOTOPES.

August 2002Dr. K Alder Intermediate 2 Chemistry Formation of ions.

Atoms & Isotopes NOTES. Reading the Periodic Table AEMAEM Atomic Number Average Atomic Mass Element Symbol.

Determining the NUMBER of Protons Electrons and Neutrons in Atoms, Ions, and Isotopes.

Isotopes and Ions.

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.

Proton, Neutron, Electron Counting Protons (p + ) are positively charged and located in the nucleus The number of protons in each atom can be found on.

Section 4.3 How Atoms Differ. Objectives Explain the role of atomic number in determining the identity of an atom Define an isotope and explain why atomic.

Atomic Structure Unit 3.

Unit 3: Atomic Structure. A. Subatomic Particles Most of the atom’s mass (Mass Number) NUCLEUS ELECTRON CLOUD PROTONS NEUTRONS ELECTRONS POSITIVE CHARGE.

Rutherford’s Atom/Past Electrons orbit nucleus similar as planets to the sun Atom of the Present Electrons orbit nucleus in the form of clouds.

Atomic Structure What are atoms made of? How are atoms put together? What are Elements? Isotopes?

.  Matter is anything that has mass and takes up space.  The amount of space taken up, or occupied, by an object is its volume.  One object cannot.

Parts of the Atom: Properties  Protons: –Positive charge –Located in nucleus –Mass = 1 amu (Atomic Mass Unit)  Neutrons –No charge (neutral) –Inside.

ELECTRONS. Review Electrons were discovered by ______________ Electrons have a ___________ charge Electrons are located…. Outside of the nucleus in an.

Chapter 8 Earth Chemistry Part – Atomic Number  An atom of a specific element is different from other elements by the number of protons it has.

 The basic unit of an element that can retain the properties of that element in a chemical reaction.

Matter & The Atom (adapted from a ppt on

The Structure of the Atom. 1.The Atom a. “the building blocks” of all matter b. Particles that make up the atom: 1.Nucleus a. “core” of the atom b

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

UNIT 3: DAY 1 AND DAY 3 ATOMIC STRUCTURE. ATOM, ELEMENTS, AND COMPOUNDS Atoms are the smallest unit of matter In classification, all atoms are elements.

Abundant elements. Hydrogen atoms make up about 90% of the total mass of the universe. they make up about 1% of the Earth’s crust most are combined with.

1 The Atom Atomic Number and Mass Number Isotopes.

Intermediate 2 Chemistry Formation of ions

Atomic Structure Isotopes.

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

Structure of Atoms Page 55 of INB.

Atomic Structure Modern Atomic Theory.

Neutrons Protons Electrons.

Atomic Structure Chemistry, Unit 1.

I have 8 protons, 8 neutrons, and 10 electrons.

Some atoms for Ions IONS IONS

The Chemistry of Life.

Atomic Structure.

INTRODUCTION TO ATOMS CHAPTER 3 section 1.

Calculating PEN (protons, electrons, neutrons) for Atoms and Ions

Foldables: Atoms Terms.

Notes: Atomic Structure

Atomic Structure Chemistry.

More on Atoms Forces and Isotopes.

Chemistry Unit: Chapter 3

1. What are these two atoms of carbon called?

The Atom Unit 2 Topic 1.

Atomic Number, Mass Number, Atomic Mass and Isotopes

ATOMIC STRUCTURE If you see a cloud circle that in your foldable.

1. What are these two atoms of carbon called?

Introduction to Atomic Structure

Isotopes and Ions.

Presentation transcript:

3-3 Modern Atomic Theory By Ms. Pacheco

Parts of the Atom NAMECHARGEMASSLOCATION Proton Neutron Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+1 Neutron Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+1 Neutron0 Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+1 Neutron0 Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amu Neutron0 Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amu Neutron01 amu* Electron

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amu Neutron01 amu* Electron0

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amuNucleus Neutron01 amu* Electron0

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amuNucleus Neutron01 amu*Nucleus Electron0

Parts of the Atom NAMECHARGEMASSLOCATION Proton+11 amuNucleus Neutron01 amu*Nucleus Electron0Electron cloud

* Neutrons are slightly larger than protons ** Electrons are so small that their mass is said to be negligible

Henry Moseley A British scientist, he is a student of Rutherford In 1913, he makes one of the most important discoveries in chemistry. He found out that an atom’s identity comes from its # of protons (atomic number). Moseley was 26 at the time! 1915: Sadly, Moseley is killed in battle in Turkey during WWI.

Said Millikan of Moseley… “…Had the European War had no other result than the snuffing out of this young life, that alone would make it one of the most hideous and most irreparable crimes in history."

Henry Moseley in his lab…

From Moseley’s ideas, we now know… That since an atom has a neutral charge, then the number of protons must equal the number of electrons. That an atom that loses or gains electrons has a charge and is known as an ion.

How to find the charge of an ion… Charge = # P - #E A magnesium ion has 12 protons and 10 electrons. What is its charge? Charge = # P - #E = = Mg +2

Isotopes… Are atoms that have the same number of protons, but a different number of neutrons.

Mass number… Is the sum of an isotopes protons plus neutrons. Is sometimes written at the end of the atom’s name. Ex: carbon-14

carbon-12 v’s carbon-14 Both are carbon, so both have 6 protons Their mass numbers are 12 and 14. Due to subtraction, carbon-12 has 6 neutrons and carbon-14 has 8.

Atomic Mass… Is the average mass of an element’s atoms as they appear in nature. The atomic masses of all elements are based on the atomic mass of the carbon-12 atom.

Chlorine’s Isotopes Chlorine % Chlorine % Therefore, the average mass (atomic mass) of chlorine is