'Calculating average atomic mass' presentation slideshows

The Components of Matter

Chapter 2. The Components of Matter. Categories of Matter. MATTER. MIXTURES. PURE SUBSTANCES. ELEMENTS. COMPOUNDS. HOMOGENOUS. HETEROGENEOUS. Composed only of atoms of the same element. Two or more elements chemically combined. (See definitions in slide after next.).

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1 st - Atomic History & Atomic Structure

1 st - Atomic History & Atomic Structure. History. Democritus named the most basic particle atom - means “indivisible Aristotle didn’t believe in atoms thought matter was continuous. History. by 1700s, all chemists agreed: on the existence of atoms

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Chapter 3

Chapter 3. Atoms: The Building Blocks of Matter. 3-1. The Atom: From Philosophical Idea to Scientific Theory. Foundations of Atomic Theory. Democritus - First to consider the smallest piece of matter. Around 400 BC he proposed the idea of the atom, which means indivisible. No proof.

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Table of Contents

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The Atom Atomic Number and Mass Number Isotopes

The Atom Atomic Number and Mass Number Isotopes. Democritus (460 - 370 B.C.).

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Atomic Structure

Atomic Structure. IB Chemistry 2 Robinson High School Andrea Carver. The Atom: IB Objectives. 2.1.1 State the position of protons, neutrons, and electrons in atoms. 2.1.2 State the relative masses and relative charges of protons, neutrons, and electrons.

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Masses of atoms

Masses of atoms. 17.2. Warm up. Label the different parts of an atom. Complete the table with the appropriate term or number. Objectives. Compare between the atomic number and the mass number of an atom

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Unit 2-5 Ions and isotopes

Unit 2-5 Ions and isotopes. Ions: losing or gaining electrons. In an atom, protons (+) are in the center and electrons (-) are on the outside. only electrons can be added or taken away. +. +. +. +. +. this is an atom with 5 electrons and 5 protons the atom is neutral

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Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory. Ancient Belief. Ancient Greeks believed that all things were made up of earth, wind, fire, and water. Democritus. 460 BC - Greek philosopher proposes the existence of the atom

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Chapter 4: Atomic Structure

Chapter 4: Atomic Structure. Section 3 - Distinguishing Among Atoms pgs. 110-119. The Atomic Model. Based on experimental evidence: The atom is ________________________.

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Atoms

Atoms. & Atomic Theory. Defining the Atom . An atom is the smallest particle of an element that retains its identity in a reaction . The basic building blocks of matter that make-up everyday objects. Atomic Theory. Democritus was an early Greek Scholar.

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Calculating Average Atomic Mass

Calculating Average Atomic Mass. Introduction. The value for atomic mass for a particular element is the average atomic mass. Each sample of an element is composed of a mixture of different isotopes. Therefore, we need to average the masses of the isotopes to find the average atomic mass.

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Counting Atoms

Counting Atoms. Atomic Number. Atoms of different elements have different numbers of protons . Atoms of the same element all have the same number of protons . The atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element.

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3.3 Counting Atoms

3.3 Counting Atoms. Counting Atoms. Isotopes. Atoms of the same element with different masses Isotopes do not differ significantly in their chemical behavior Writing Isotopes: Hyphen notation: element-mass # (hydrogen-3) Nuclear symbol: 235 U. 92. Atomic Mass.

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Chemistry

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ISOTOPES

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How many protons, neutrons, and electrons are there in an atom of chlorine-37?

How many protons, neutrons, and electrons are there in an atom of chlorine-37? Complete the following chart:. Atomic Mass. Definition & Calculation. Weighted average of the atomic masses of the isotopes of an element. Measured in atomic mass units ( amu ).

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Calculating Average Atomic Mass

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Average Atomic Mass

Average Atomic Mass. The weighted average of the masses of all the naturally occurring isotopes of an element. Calculating Average Atomic Mass. Copper-63 accounts for 69% of the copper found naturally. Copper-65 accounts for 31% of the copper found naturally.

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Subatomic Particles

Subatomic Particles. Calculating Average Atomic Mass. expressed in atomic mass units (amu) done because actual masses so small and hard to work with based on carbon-12 assigned mass of exactly 12 amu weighted average of all naturally occurring isotopes.

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