Ch. 3 Atoms 3.3 Counting Atoms.

Slides:

Advertisements

Similar presentations

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

Advertisements

Atomic Structure Nucleus – contains protons and neutrons

Atomic Mass & Number Isotopes The Periodic Table.

Atoms: The building blocks of Matter

Wake-up 1.Explain the relationship between the following: atomic number, mass number, protons, neutrons, and electrons. 2.How do you find the number of.

Dalton was proved incorrect and his theory was modified

Ch. 3 - Atomic Structure II. Masses of Atoms (p.75-80) Mass Number

Atomic Structure I. Subatomic Particles.

Isotopes. Isotopes are atoms that have the same number of protons but different numbers of neutrons Most elements in the first two rows of the periodic.

Mass Spectrometer. Atomic Number Atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element. Element# of protonsAtomic.

Ch. 3 - Atomic Structure II. Masses of Atoms (p.75-80)  Mass Number  Isotopes  Relative Atomic Mass  Average Atomic Mass.

Wake-up Explain the relationship between the following: atomic number, mass number, protons, neutrons, and electrons. How do you find the number of electrons.

Atomic Structure The Periodic Table, Isotopes, and Average Atomic Mass.

Atoms / Elements Different number of protons Protons found in nucleus # of protons = atomic number Since atom is electrically neutral: #protons = # electrons.

Calculating Particles in a atom

Isotopes. Let’s Review ProtonsNeutronsElectrons Charge +1 0 Mass 1 amu 0 Location nucleus Electron cloud.

Proton A positively charged subatomic particle (found in the nucleus). A subatomic particle with no charge (found inside the nucleus). Neutron.

Calculating Particles for an ion. Representations from the Periodic Table Fe Iron Oxidation States Name Atomic Mass Atomic Number.

Copyright © 2012 InteractiveScienceLessons.com Isotope -Atoms of an element that have the same # of protons but a different # of neutrons.

Chapter 3, Section 3 Counting Atoms. 2 All atoms contain the same particles… Yet all atoms are not the same. What makes them different??

4.3 Atomic #, Mass #, Atomic Mass & Isotopes. Atomic Number  What are the 3 subatomic particles?  Which of the subatomic particles identifies an element?

3.3: Counting Atoms How do I count and calculate the mass of atoms?

Atomic Structure Current Atomic model

Counting Atoms.

II. Masses of Atoms Mass Number

Now you try! Helium – 4 Oxygen – 16 Magnesium – 26 Isotope

Warm-up: Complete the following table

Atomic Structure Subatomic Particles C. Johannesson.

4.2 -Atomic Structure Theory

Subatomic Particles Masses of Atoms Mass Number Isotopes Ions

ELEMENTS, IONS AND ISOTOPES

Atoms / Elements •Different number of protons

Unit 2: Atomic Theory & Structure

Counting Atoms Section 3.3.

Unit 2: Atomic Theory & Structure

III. Masses of Atoms (p ) Atomic Mass Mass Number Isotopes

The atom and Isotopes.

Basic Atomic Structure

Subatomic Particles.

Atomic Symbols protons + neutrons = mass # atomic # = protons.

Ch Atomic Structure II. Masses of Atoms (p.30-31) Mass Number

Atomic Particles Particle Charge Mass # Location Electron -1

Intro to Atomic Structure BR 10/3-4

Basic atomic Structure and Mass 2.2

H H H Isotopes element: same or different mass:

H H H Isotopes element: same or different mass:

Basic atomic Structure and Mass 2.2

What are all of these numbers for?

Isotope -an atom with a different number of NEUTRONS than protons.

I. Atomic Structure II. Masses of Atoms Mass Number Isotopes Ion

Subatomic Particles.

III. Masses of Atoms (p ) Atomic Mass Mass Number Isotopes

III. Masses of Atoms (p ) Atomic Mass Mass Number Isotopes

Atomic Symbols protons + neutrons = mass # atomic # = protons.

Ch. 3 - Atomic Structure II. Masses of Atoms (p.75-80) Mass Number

Chemistry Unit: Chapter 3

Counting Atoms CHAPTER 3.3.

Atomic Symbols protons + neutrons = mass # atomic # = protons.

Atomic Number, Mass Number, Atomic Mass and Isotopes

Ch. 4 - Atomic Structure II. Masses of Atoms Ch.4 Mass Number Isotopes

III. Masses of Atoms Atomic Mass Mass Number Isotopes

Ch. 4 - Atomic Structure II. Masses of Atoms Mass Number Isotopes

ARE ALL ATOMS OF THE SAME ELEMENT IDENTICAL?

Structure of an Atom What is an ATOM??? Pg

Subatomic Particles.

Atomic Particles Particle Charge Mass (kg) Location Electron -1

Counting Subatomic Particles

Presentation transcript:

Ch. 3 Atoms 3.3 Counting Atoms

Atomic Number (Z) number of protons All atoms of the same element have the same atomic number located above the symbol in the periodic table order of the elements in the periodic table

Isotopes atoms of the same element with different numbers of neutrons most elements exist as a mixture of isotopes What do the Carbon isotopes below have in common? What is different about them?

Mass Number sum of particles in nucleus A = #p + #n Hydrogen isotopes have special names: protium deuterium tritium What do the prefixes in their names come from?

Designating Isotopes Hyphen notation: Nuclear Symbol notation: Name - mass number ex. Carbon – 13 Nuclear Symbol notation:

Examples 7 protons, 8 neutrons Nitrogen-15 17 electrons, 19 neutrons Chlorine- 36

Examples 3. Z=5, 6 neutrons Boron- 11 4. A=75, 42 neutrons Arsenic- 75

Examples Carbon- 13 Xenon-131 Sodium-24 Oxygen- 15 #p #n #e Z A 6 7 6 6 13 54 77 54 54 131 11 13 11 11 24 8 7 8 8 15

Examples #p #n #e Z A 3 5 3 3 8 11 11 11 11 22 4 4 4 4 8 26 30 26 26 56