Hello Chemistry Students: 9/21/15 ChemCatalyst: 1. What are the three particles atoms are made of?...

Hello Chemistry Students: 9/21/15

ChemCatalyst:1.What are the three particles

atoms are made of?2.Draw a atom.

The Atom: Calculating Protons, Neutron, and ElectronsChemistry/Pre-AP ChemistryMs. Lizette GutierrezAustin High School

What is an Atom?0The atom is the smallest part of an element that still retains the properties of that element .

0First proposed by Democritus

Structure of the AtomAtoms are composed of 2 regions:

0Nucleus0 The center of the atom 0Contains 99.9% mass of the atom0Hold protons and neutrons0Dense part of atom

0Electron cloud0Area surrounding the nucleus0Contains must of the volume of

the atom0 Mostly empty space 0Holds electrons

Subatomic Particles An atom is composed of three subatomic particles:

0Proton (+)0 It’s a particle located IN THE NUCLEUS of an atom0 It has a charge of +1 0 mass of 1 amu (atomic mass units). 0 The protons determine the identity of element (Atomic

Number)0Neutron (0)

0 It’s a particle located IN THE NUCLEUS of an atom0 It has a charge of 0 (no charge)0 mass of 1 amu (atomic mass units)

0Electron (-)0 It’s a particle located AROUND THE NUCLEUS of an atom0 It has a charge of -1 0 mass of 0 amu (atomic mass units)

How do the subatomic particles balance each other?

In an Neutral atom (assume):0 # PROTONS = # ELECTRONS0A neutral atom has an overall electrical charge

of Zero, because it contains the same number of protons (+) and electrons (-).

0 The neutrons have no charge; therefore they do not have to equal the number of protons or electrons

Carbon Atom

6 protons (+) = +66 electrons (-) = -66 neutrons (0) = 0____________________

0 (neutral)

Bohr Model (Simplest Atomic Structure)

Energy Levels:• circular areas

around the nucleus where electrons travel

• Electrons in an atom are contained in specific energy levels (1, 2, 3, …) that are different distances from the nucleus.

Electron

Electron (-)

Neutron (0)

Nucleus

Proton (+)

Models of Atoms

Bohr Model

Basic Atomic Structure Foldable

0 Using this PowerPoint fill in the information for each flap on your foldable

0 Glue into your Notebook.

0 Title: “THE ATOM”

0 BE NEAT!

0 Coloring Instructions 0 PROTONS – highlight pink0 NEUTRONS– highlight green0 ELECTRONS – highlight orange

Hello Chemistry Students: 9/21/15 ChemCatalyst: 1. What are the three particles atoms are made of?...

Documents

Transcript of Hello Chemistry Students: 9/21/15 ChemCatalyst: 1. What are the three particles atoms are made of?...

Life on the edge Valance electrons. Unit 1 Investigation III ChemCatalyst The three atoms below have similar reactivity and chemical behavior. –Where.

1 CHAPTER 2 Atoms, Molecules and Ions. 2 Atoms Each element composed of atoms All atoms of a given element are identical Atoms of an element.

What are atoms? Describe them.

Atoms: Not to Be Cut. Dalton’s Theory He deduced that all elements are composed of atoms. He deduced that all elements are composed of atoms. Atoms are.

BUILDING ATOMS Atomic structure. Unit 1 Investigation III ChemCatalyst A Bohr model of a helium atom and a beryllium atom are given below. Helium, HeBerylium,

atoms, elements, molecules & compoundschemtextbook.com/wp-content/uploads/2019/11/atoms-molecules-c… · Two or more atoms bonded together are called molecules. All substances are

Atoms, Molecules, and Ions Dalton’s Atomic Theory 1) Elements are made up of atoms 2) Atoms of each element are identical. Atoms of different elements.

Chapter 5 Atomic Structure. What are atoms made of? Atoms are made of small particles called protons, electrons, neutrons. Atoms are made of small particles.

Introduction to Matter Matter & Measurements · Small units of matter: atoms, compounds & molecules Atoms – Atoms are the smallest particles within matter – Atoms are made up

Atoms. ATOMS Picture Caption Here Atoms are building blocks. Atoms are so tiny they can’t be seen, even with the most powerful microscope. An Atom is.

Atoms and Their Structure Chapter 4. Atoms Elements are made of particles called atoms Atoms are the smallest pieces of matter that contain all the properties.

How are atoms studied? Atoms are the building blocks of matter Atoms are too small in size to study easily Size of Earth : soda can = soda can : atom.

ATOMIC STRUCTURE Modern theory of matter. LET’S REVIEW Dalton’s atomic theory – Elements are made of atoms ; all atoms of an element are identical, atoms.

Counting Atoms and Balancing Chemical Equations. Subscripts C 12 H 22 O 11 There are 12 atoms of Carbon There are 22 atoms of Hydrogen There are 11 atoms.

Classification of Organisms Chapter 14. Basic Biological Organization Atoms are organized into molecules Atoms are organized into molecules Cells are.

Chapter 4 Atoms and Elements 2 Experiencing Atoms atoms are incredibly small, yet they compose everything atoms are the pieces of elements properties.

Atoms and Elements. Atoms Atoms are the “building blocks” of all matter and are the simplest form of molecule. They are all made up of protons, neutrons.

Chapter 3 Atoms and Elements - umsl.educhickosj/56/lecture3.pdf · Chapter 3 Atoms and Elements. Atomic Theory Atoms are tiny particles of matter. Atoms are made up of ... mass of

Chapter 4 Atoms and Elements · Tro's "Introductory Chemistry", Chapter 4 2 Experiencing Atoms • Atoms are incredibly small, yet they compose everything. • Atoms are the pieces

Are spin-polarized atoms clustering ?