Catalyst Finish these sentences: Elements are… I THINK atoms are…

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Presentation transcript:

Catalyst Finish these sentences: Elements are… I THINK atoms are…

Homework Time

Unit 1 – Atomic Theory and the Periodic Table Death by Element

Who’s in Charge?

It takes 31 cuts to get to the size of the atom! It is mm!

CutsSize (mm)Reference 0280N/A 1140Child's hand 270Fingers 335Watch 417.5Keyboard keys Poppy seeds Thread Human Hair Width of paper Bacteria Visible light waves E-05Membranes E-07Size of the atom!

Lecture 1.1 – Introduction to the Atom

Today’s Learning Target LT 1.1 – I can identify the size, location, and mass of the three subatomic particles found in the atom.

Size of the Atom The atom has a diameter between 0.1 – 0.5 nm Point of reference: A basketball has a diameter of 234,500,000 nm

Three Types of Subatomic Particles All atoms contain the following subatomic particles: 1.Protons 2.Neutrons 3.Electrons

Protons Protons are found in the nucleus of an atom. The nucleus is located in the center of the atom. Protons have a positive charge. We say that their charge is +1

Neutrons Neutrons are found in the nucleus of an atom. Neutrons do not have a charge. They are neutral James Chadwick discovered the neutron in 1932!

Mass of Protons and Neutrons Protons and neutrons have the same mass. Each subatomic particle has a mass of 1 amu. – amu = atomic mass unit

Electrons Electrons are found in the electron cloud. The electron cloud surrounds the nucleus of an atom. Electrons have a -1 charge

Mass of Electrons Electrons have a mass that is amu. Electrons do not contribute to the weight of an atom.

Neutral Like the car gear, like water, like switzerland! To be neutral, the positives and negatives must cancel out! Neutral Tweet! Equal nmbr of protons and electrons #Chemswag #Learning #MrAstorIsABoss The resulting charge is zero!

SUMMARIZE

Collaborative Station: Death by Element Reading Complete the reading with your table You must answer all questions

Exit Ticket Subatomic Particle SizeChargeLocation Proton Neutron Electron

Rate Yourself Based on the exit ticket and your current level of understanding, rate yourself 1 – 4 on LT 1.1

Closing Time No homework!