Topic: Chemistry Aim: Explain how elements are classified in the Periodic Table of Elements. Do Now:...
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Transcript of Topic: Chemistry Aim: Explain how elements are classified in the Periodic Table of Elements. Do Now:...
Topic: Chemistry
Aim: Explain how elements are classified in the Periodic Table of Elements.
Do Now: http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/compounds_mixtures/activity.shtml
HW: Other side of homework ditto.
http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/compounds_mixtures/revise9.shtml
Periodic Table of Elements
• System of grouping all of the known elements and to predict the properties of elements
•Atomic number: # of protons –Never changes– Same as # of electrons (in a neutral atom)
–Different for each element
• Ex: Family 2 (Alkaline Earth Metals) –are less reactive than alkali
metals–highly reactive–are shiny
Topic: ChemistryAim: Explain how elements are classified in the
Periodic Table of Elements.
Do Now:
HW: Color the nonmetals, metalloids and noble gases on your periodic table different colors.
(Chemistry Castle Learning due on Monday!)
Determine the:• # of protons• # of electrons• # of neutrons
Noble gases glow brightly when an electric charge is passed through them, and so are used as advertising signs: neon tubes glow red, xenon blue, and krypton bluish-white; argon tubes glow pale red at low pressures, blue at high pressures.
Let’s summarize…
1. Explain how the periodic table of elements is arranged.
2. What are the various pieces of information that can be found in an element key?
3. Describe the location of metals, nonmetals, metalloids and noble gases on the periodic table.
Review:
1. Elements in the periodic table are arranged by
2. atomic number
3. atomic weight
4. number of neutrons
5. chemical reactivity
2. Which of these things will you NOT find in the periodic table?
1. Element symbol
2. Atomic weight
3. Atomic orbital radius
4. Atomic number
3. Elements at the left of the periodic table are known as
1. Nonmetals
2. Metals
3. Noble Gases
4. Metalloids
4. Elements at the right of the periodic table are known as
1. Nonmetals
2. Metals
3. Noble Gases
4. Metalloids
5. Volume is
a.the amount of matter in an object
b.the amount of space an object takes up.
c.the gravitational pull on an object.
d.an object's resistance to a change in motion.