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Atomic Structure I. Subatomic Particles
Subatomic Particles equal in a neutral atom Atomic NumberNUCLEUS ELECTRONS equal in a neutral atom PROTONS NEUTRONS NEGATIVE CHARGE QUARKS Atomic Number equals the # of... POSITIVE CHARGE NEUTRAL CHARGE Most of the atom’s mass.
Subatomic Particles Quarks component of protons & neutrons 6 typesHe 3 quarks = 1 proton (2+, 1-) or 1 neutron (1+, 2-)
Atomic Structure II. Masses of Atoms Mass Number IsotopesRelative Atomic Mass Average Atomic Mass
A. Mass Number mass # = protons + neutrons always a whole number© Addison-Wesley Publishing Company, Inc. always a whole number NOT on the Periodic Table!
B. Isotopes Mass # Atomic #Atoms of the same element with different mass numbers. Nuclear symbol: Mass # Atomic # Hyphen notation: carbon-12
B. Isotopes © Addison-Wesley Publishing Company, Inc.
B. Isotopes Chlorine-37 atomic #: mass #: # of protons:# of electrons: # of neutrons: 17 37 20
C. Relative Atomic Mass 12C atom = 1.992 × 10-23 g atomic mass unit1 amu = 1/12 the mass of a 12C atom 1 p = amu 1 n = amu 1 e- = amu © Addison-Wesley Publishing Company, Inc.
D. Average Atomic Mass Avg. Atomic Massweighted average of all isotopes on the Periodic Table round to 2 decimal places Avg. Atomic Mass
D. Average Atomic Mass EX: Calculate the avg. atomic mass of oxygen if its abundance in nature is 99.76% 16O, 0.04% 17O, and 0.20% 18O. Avg. Atomic Mass 16.00 amu
D. Average Atomic Mass EX: Find chlorine’s average atomic mass if approximately 8 of every 10 atoms are chlorine-35 and 2 are chlorine-37. Avg. Atomic Mass 35.40 amu
Reviewing Subatomic Particles
I. Subatomic Particles (p )
Section 4.3 How Atoms Differ
Atomic Structure Nucleus – contains protons and neutrons
OF PROTONS, NEUTRONS AND ELECTRONS IN AN ATOM
Essential Question: How do atoms of the same element differ?
Subatomic Particles and Isotopes. Subatomic Particles Protons- Positively Charged Protons- Positively Charged Located in the nucleus Located in the nucleus.
Protons, neutrons, electrons too Make up the atoms all around you!
I. Structure of the Atom Dalton’s Atomic Theory Subatomic Particles
ISOTOPES Chemistry. I. Why Atoms Differ? A. Atoms of different elements have their own unique structures 1. Because they have different structures they.
Ch. 3 - Atomic Structure II. Masses of Atoms (p.75-80) Mass Number
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.
Determining the number of subatomic particles in an atom.
Chapter 18 Lesson 2 Masses of Atoms
Atoms and the Periodic Table
Atomic Number- the number of protons in the nucleus of an atom of that element Ex: Hydrogen atoms have only one proton in the nucleus, so the atomic.
Proton, Neutron, Electron Counting Protons (p + ) are positively charged and located in the nucleus The number of protons in each atom can be found on.
Isotopes Atoms of the same element with different mass numbers. Mass # Atomic # Nuclear symbol: Hyphen notation: carbon-12 Courtesy Christy Johannesson.
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