Parts of the Atom What do the numbers mean?

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Presentation transcript:

Parts of the Atom What do the numbers mean? Atomic Structure Parts of the Atom What do the numbers mean?

Learning Targets: I can arrange the atomic particles by size (DOK 1) I recognize the significance of the number of protons in an atom and how that number relates to the identity of the atom (DOK 1) I can relate the atomic number of an atom to the number of electrons in a neutral atom (DOK 2) I can explain and interpret the numbers and symbols on the periodic table (DOK 1 and DOK 3)

Atomic Particles Particle Charge Mass # Location Electron -1 Electron Cloud Proton +1 1 Nucleus Neutron

What is an atom made up of? Atomic Particles: Proton Identifier for the atom, keeps electrons attached to the atom Slightly smaller than the neutron Neutron Stabilize the atom Slightly larger than the proton Electron Allowing for atoms to bond to other atoms Smallest of the 3 subatomic particles

What makes up the subatomic particles? What is the smallest thing on earth? Please click on the above link to watch the video.

What do the numbers and letters on the periodic table mean? Atomic Number Atomic Symbol Element Name Atomic Mass

Atomic Number This is the number of protons in the nucleus, of an atom…. ALWAYS! Think of it like an atom’s DNA It is what makes an element an element It also tells you how many electrons are in a STABLE atom. Protons = electrons in stable atoms ATOMIC NUMBER

Recognizing Atomic Numbers: Element Atomic Number Lithium (Li) Sulfur (S) 8 Carbon (C) 11

Atomic Number Practice: Element Atomic Number # of Protons # of Electrons Nitrogen 17 10 8 6

Atomic Mass Is the number of protons PLUS the number of neutrons in the nucleus of an atom. Unit is Atomic Mass Units (AMU’s) Atomic Mass

Atomic Mass: Mass # = p+ + n0 Atomic Mass: Mass # = p+ + n0 *plug in what you know, and you can determine the mass, the number of neutrons, the number of protons, or the element. Element # of protons # of neutrons # of electrons Mass # Oxygen 8 16 Arsenic 33 42 75 Phosphorous 15 31

Complete this chart in your notes: Element # of Protons # of Electrons Atomic # Atomic Mass # of Neutrons Carbon 6 12 Sulfur 16 Sodium 11 79 27 14 Helium (He) 4 20 Polonium (stable) 84 Lead 82

Check your work: Element # of Protons # of Electrons Atomic # Atomic Mass # of neutrons Carbon 6 12 Sulfur 16 32 Sodium 11 23 Gold (Au) 79 197 118 Aluminum 13 27 14 Helium 2 4 Calcium 20 40 Polonium (Stable) 84 209 125 Lead 82 207