Presentation is loading. Please wait.

Presentation is loading. Please wait.

Atomic Mass/Percent Composition. Average of Isotopes Every element typically exists in several isotope forms Isotopes are atoms of the same element with.

Published byCuthbert Summers Modified over 8 years ago

Similar presentations

Presentation on theme: "Atomic Mass/Percent Composition. Average of Isotopes Every element typically exists in several isotope forms Isotopes are atoms of the same element with."— Presentation transcript:

1 Atomic Mass/Percent Composition

2 Average of Isotopes Every element typically exists in several isotope forms Isotopes are atoms of the same element with different numbers of neutrons The mass recorded on the periodic table is a weighted average of all the naturally occurring isotopes of the element

3 Mass Spectometer Instrument used to measure the mass of components of a substance

4

5

6 Example Chlorine is found in two isotope forms. One has a mass of 34.97 amu, the other a mass of 36.97 amu. The first makes up 75.5% of the sample. What is the average atomic mass of the chlorine?

7 Percent Composition In a compound, each element has constant percent of each element by mass (law of definite composition) What is the percent composition of each element in the compound C 10 H 14 O?

8 Example What is the mass of carbon in 2.86g of CO 2 ? What is the mass of hydrogen in 1.85g of water?

Download ppt "Atomic Mass/Percent Composition. Average of Isotopes Every element typically exists in several isotope forms Isotopes are atoms of the same element with."

Similar presentations

Average Atomic Mass & % Abundance

Average Atomic Mass & % Abundance
Topic: Iosotopes and Avg. Atomic Mass  Do Now:. Dalton 1766 Remember #2…well Dalton was correct… 1)Atoms (tiny) 2)Atoms of same element are identical.

Topic: Iosotopes and Avg. Atomic Mass  Do Now:. Dalton 1766 Remember #2…well Dalton was correct… 1)Atoms (tiny) 2)Atoms of same element are identical.
AIM: HOW TO CALCULATE THE AVERAGE ATOMIC MASS? DO NOW:1. WHAT ARE THE 3 SUBATOMIC PARTICLES OF AN ATOM? LIST THE THREE SUBATOMIC PARTICLES AND THEIR CHARGE.

AIM: HOW TO CALCULATE THE AVERAGE ATOMIC MASS? DO NOW:1. WHAT ARE THE 3 SUBATOMIC PARTICLES OF AN ATOM? LIST THE THREE SUBATOMIC PARTICLES AND THEIR CHARGE.
Atomic Structure Nucleus – contains protons and neutrons

Atomic Structure Nucleus – contains protons and neutrons
Chapter 11B Notes Determining Isotope Masses. Intro What is the mass of an atom with 6 protons and 6 neutrons? 12 What is the mass of an atom with 6 protons.

Chapter 11B Notes Determining Isotope Masses. Intro What is the mass of an atom with 6 protons and 6 neutrons? 12 What is the mass of an atom with 6 protons.
Essential Question: How do atoms of the same element differ?

Essential Question: How do atoms of the same element differ?
Average Atomic Mass.

Average Atomic Mass.
The Atom & the Periodic Table. Reading the Periodic Table.

The Atom & the Periodic Table. Reading the Periodic Table.
Average Atomic Mass Due Monday Oct 14, 2013

Average Atomic Mass Due Monday Oct 14, 2013
 Definition: Atoms of the same element that differ in their # of neutrons; therefore, they have different mass numbers.  Nearly every element has isotopes!

 Definition: Atoms of the same element that differ in their # of neutrons; therefore, they have different mass numbers.  Nearly every element has isotopes!
Average Atomic Mass. Masses of Atoms A scale designed for atoms gives their small atomic masses in atomic mass units (amu) An atom of 12 C was assigned.

Average Atomic Mass. Masses of Atoms A scale designed for atoms gives their small atomic masses in atomic mass units (amu) An atom of 12 C was assigned.
 Each element on the periodic table has an isotope.  What make an element have different isotopes?  There are 2 different isotopes of iron  Find the.

 Each element on the periodic table has an isotope.  What make an element have different isotopes?  There are 2 different isotopes of iron  Find the.
Classification of Matter. Atomic Theory of Matter The theory that atoms are the fundamental building blocks of matter reemerged in the early 19th century,

Classification of Matter. Atomic Theory of Matter The theory that atoms are the fundamental building blocks of matter reemerged in the early 19th century,
Atomic Mass. Isotopes Reminder Yesterday we learned that the mass of all atoms of a certain element are not always the same –Some atoms may have more.

Atomic Mass. Isotopes Reminder Yesterday we learned that the mass of all atoms of a certain element are not always the same –Some atoms may have more.
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.

Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.
Isotopes Atoms of the same element that different mass numbers

Isotopes Atoms of the same element that different mass numbers
The Atom.

The Atom.
Average Atomic Mass The weighted average of the masses of all the naturally occurring isotopes of an element.

Average Atomic Mass The weighted average of the masses of all the naturally occurring isotopes of an element.
Date: Objective Background Lab 8 The Atomic Mass of “Boltium”

Date: Objective Background Lab 8 The Atomic Mass of “Boltium”
Average Atomic Mass.

Average Atomic Mass.

Similar presentations

Ads by Google