chemistry october 20, 2014 atomic concept atomic number and mass number

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CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

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Page 1: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

CHEMISTRYOCTOBER 20, 2014

ATOMIC CONCEPTATOMIC NUMBER AND MASS

NUMBER

Page 2: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

SCIENCE STARTER

• You are seated and quiet• You have 2 minutes•Do the SCIENCE STARTER

Page 3: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

AIM

•How do we read the periodic table?

Page 4: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

PUZZLES

• Using the Periodic Table, solve the puzzles. You are given 10 minutes.• You may work with a partner. Both

partners must be actively participating. I will be walking around grading you on your participation. • Stop when you see the stop sign

Page 5: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

DEBRIEF

• So, what is the atomic number?• How did you know where to find it?• How did you know what is the

number of protons?• How did you know what is the

number of electrons?

Page 6: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

VOCABULARY

•ATOMIC NUMBER•MASS NUMBER•ATOMIC MASS•ATOMIC MASS UNIT•PERIODIC TABLE

Page 7: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

ATOMIC NUMBER

• the number of protons that an atom has in its nucleus

Page 8: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

MASS NUMBER

• number of neutrons and protons in an atom for an element

Page 9: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

ATOMIC MASS

•weighted average mass of an atom of an element based on the relative abundance of that element’s isotopes

Page 10: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

ATOMIC MASS UNIT

•unit for atomic mass

Page 11: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

PERIODIC TABLE

• a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

Page 12: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

One atomic mass unit

•1/12 of the mass of a carbon atom that contains 6 protons and 6 neutrons

Page 13: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

AMU

•Proton = 1 amu•Neutron = 1 amu• Electron = 0 amu (almost

zero so do not count)

Page 14: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

READING THE PERIODIC TABLE

http://www.bing.com/images/search?q=Carbon+Periodic+Table&FORM=R5FD1

Page 15: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

READING THE PERIODIC TABLE• Element = Carbon• Symbol = C• Atomic Number = 6• Atomic Mass = 12.0107 amu• Mass Number = 12• Number of Protons = 6• Number of Electrons = 6• Number of Neutrons = 6

http://www.bing.com/images/search?q=Carbon+Periodic+Table&FORM=R5FD1

Page 16: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

TRY ITElement Symbol Atomic

NumberAtomic Mass Mass

NumberProton Neutron Electron

Hydrogen

Oxygen

Krypton

Helium

Lithium

Gold

Page 17: CHEMISTRY OCTOBER 20, 2014 ATOMIC CONCEPT ATOMIC NUMBER AND MASS NUMBER

Element Symbol Atomic Number

Atomic Mass Mass Number

Proton Neutron Electron

Hydrogen H 1 1.00794 amu 1 1 0 1

Oxygen O 8 15.9994 amu 16 8 8 8

Krypton Kr 36 83.798 amu 84 36 48 36

Helium He 2 4.002602 amu

4 2 2 2

Lithium Li 3 6.94 amu 7 3 4 3Gold Au 79 196.966569

amu197 79 118 79

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