ATOMS NOTES Adapted from www.chem4kids.com.

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Presentation transcript:

ATOMS NOTES Adapted from www.chem4kids.com

Subatomic Particles Name Charge Location Mass Proton (p) Positive + nucleus 1 amu Neutron (n) Neutral Electron (e-) Negative - Electron cloud .0018 amu

Atomic Mass Unit (amu) SI (International System of Unit) unit for subatomic particles’ mass Mass of 1 proton = 1.7 x 10-24 grams Mass of 1836 e- = mass of 1 p

Nucleus Small, dense center of an atom Contains protons & neutrons Has an overall positive charge Contains most of the atom’s mass

ELEMENT “FACE” 6 C Carbon 12 Shows info about an element on periodic table 6 C Carbon 12

Atomic Number (# of protons) (# of electrons) 6 C Carbon 12

C 6 Carbon 12 Atomic Number Element Symbol (# of protons) (# of electrons) 6 C Carbon 12 Element Symbol

C 6 Carbon 12 Atomic Number Element Symbol Element Name (# of protons) (# of electrons) 6 C Carbon 12 Element Symbol Element Name

C 6 Carbon 12 Atomic Number Element Symbol Element Name Atomic Mass (# of protons) (# of electrons) 6 C Carbon 12 Element Symbol Element Name Atomic Mass (#of protons + # of neutrons)

Electrons Travel in regions of space around the nucleus (electron cloud, energy levels, orbitals) Valence Electrons In outermost energy level Play important role in chemical reactions Energy Level # of e- 1st 2 2nd 8 3rd 18

Atomic Mass #p + #n Atomic Number - #p # of neutrons #n

Carbon e- 6p 6n e- e- e- e- e-