Lecture 59/9/05. Quiz 2 1. Which of the following has the highest temperature? 30 °C 80 °F300 K 2. How many protons and neutrons does an atom of potassium-40.

Slides:

Advertisements

Similar presentations

1 By definition: 1 atom 12 C “weighs” 12 amu On this scale 1 H = amu 16 O = amu Atomic mass is the mass of an atom in atomic mass units (amu)

Advertisements

Mass Relationships in Chemical Reactions Chapter 3.

 What is the percent composition of N and O in NO 2 ?

The Mole Chapter 9 What is a mole? A mole of a substance is the amount of that substance which contains 6 x particles of that substance.

Atomic Mass & Number Isotopes The Periodic Table.

Chapter 3: Elements and the Periodic Table

IIIIIIIV Unit 5 – The Mole I. Molar Conversions. Molar Conversions n Molar Mass is a conversion factor to convert mass of any element or compound to moles.

Mr. Skirbst Physical Science Topic 14

Mastering the Periodic Table

Physical Science Moles. Atomic number- number of protons in that atom  Represented by “Z” Ex) Z=11 Mass number- number of protons and neutrons  Represented.

Chemistry Daily 10’s Week 7.

Mass Relationships in Chemical Reactions. By definition: 1 atom 12 C “weighs” ________ On this scale 1 H = ________ amu 16 O = ________ amu _________________.

Chapter 7: Chemical Formulas and Chemical Compounds

The Mole and Avogadro’s Number

Chemical Measurements

THE MOLE 10/1/14 – CHAPTER 3. RELATIVE MASS VS AVERAGE ATOMIC MASS RM = the standard - atomic mass of carbon-12 is used - 1 amu = 1/12 mass of 1 carbon-12.

Let’s Talk Chemistry!. 1. The Atom  basic unit of matter  made up of protons, neutrons and electrons  the atom is neutrally charged (no charge) Helium.

+ I. Section 1 Organizing the Elements. + A. Mendeleev the Detective 1. Made observations to help make a pattern in the elements 2. Some have similar.

3-3: Counting Atoms Beaker Breaker 1.What was the name of Rutherford’s experiment? 2.What did Rutherford’s experiment discover? 3.My atomic number is.

History of the Periodic Table The scientists behind the organization.

The Periodic TableSection 1 Recognizing a Pattern 〉 How did Mendeleev arrange the elements in his periodic table? 〉 In his periodic table, Mendeleev arranged.

Moles. Stoichiometry The study of quantitative relationships between the amounts of reactants used and products formed by a chemical reactions; it is.

Chemical Calculations Mole to Mass, Mass to Moles.

The Periodic Table Understanding the Periodic Table of Elements.

Moles COUNTING BY WEIGHING. Moles (is abbreviated: mol)  It is an amount, defined as the number of carbon atoms in exactly 12 grams of carbon-12.  1.

The Mole How We Count Atoms and Other Fundamental Particles.

Introduction to the Periodic Table Atomic Number ● Symbol ● Atomic Weight Element ● Compound ● Mixture.

Understanding the mole is critical for your future success in chemistry as it is used in most chemical calculations. The Mole Chemistry 8(A)

The Periodic Law History of the Periodic Table.  Objectives  Explain the roles of Mendeleev and Moseley in the development of the periodic table  Describe.

Organizing elements Periodic table. Mendeleev developed a periodic table that arranged elements in order of increasing atomic mass. He studied the melting.

Molar Mass = mass in grams of one mole –Units grams/mole Molar Mass = atomic mass Why aren’t all atomic masses whole numbers? –Remember that atomic masses.

Moles and Avogadro’s Number Molar mass, Molecular weight.

Molecular Formulas & Relative Atomic Mass The Use of Avogadro’s Hypothesis.

(8th) Chapter 4-2 Cornell Notes “Organizing the Elements”

Relative atomic mass. All of the elements on the periodic table make up everything in our world! The periodic table consisting of most of the known elements.

Moles and Calculating Molar Mass. The mole is the S.I. unit for the amount of a substance. A mole is the amount of a substance that contains as many particles.

Essential Question: How do atoms of the same element differ?

Lecture 5. THE MOLE Avogadro's number The mole is used when we're talking about numbers of atoms and molecules (tiny particles).moleatomsmolecules The.

Mass Relationships in Chemical Reactions Chapter 3.

Organizing the Elements Essential Question: What determines where an element will be located in the periodic table?

NJ ASK REVIEW CHEMISTRY

MOLAR MASS CHAPTER 7-2.

MASS and MOLES Page 57 of INB.

Ch. 10 Molar Quantities Notes

Bell Ringer How many moles of Nitric acid are there in 250 g?

Understanding the Periodic Table of Elements

Ch 7 Mole & chemical composition

Organizing the Elements

Formula Weights © 2012 Pearson Education, Inc..

The Mole and Avogadro’s Number

Remembering Scientific Notation…..

Goal 2 – Atoms and The Periodic Table

Section 2 Tour of the Periodic Table p. 111

The Mole Unit 3.

Moles Foothill Chemistry.

The Periodic Table.

Molar Conversions.

Molar Conversions (p.80-85, )

Lesson 5: Mendeleev and the Periodic Table

Calculating Average Atomic Mass

The Structure of an Atom

Elements and the Periodic Table

Unit: Chemistry Lesson 2: Organizing the Elements Essential Questions:

Molar Conversions.

The Mole Mole: convenient measure of chemical quantities.

ELEMENTS AND THE PERIODIC TABLE

Presentation transcript:

Lecture 59/9/05

Quiz 2 1. Which of the following has the highest temperature? 30 °C 80 °F300 K 2. How many protons and neutrons does an atom of potassium-40 have?

1 mole =the amount of substance that contains as many particles (atoms, molecules) as there are in 12.0 g of 12 C. THE MOLE 1 mole = x particles = Avagadro’s number

MOLAR MASS sum of the atomic weights of all atoms in the molecule molecular weight in grams/mole

1 mol of 12 C = g of C = x atoms of C g/mol is the molar mass of 12 C g/mol is the molar mass of carbon (taking into account all of the isotopes of C)

Mass to Moles

How many moles of Mg is represented by g? How many atoms? Mg has a molar mass of g/mol. = 4.95 x atoms Mg How many atoms in this piece of Mg?

Dmitri Mendeleev (mid-19 th cen) Periodic Table Lined up elements in horizontal rows with increasing atomic weight Started new rows when properties seemed similar Left space in table where he predicted new elements would be discovered

HGJ Moseley (1913) Discovered a method to determine atomic number Realized Periodic Table should be organized by atomic number Law of Chemical Periodicity: Properties are periodic functions of atomic #

Periodic Table