Bellringer 9/15 1.Convert 0.62 miles into meters Conversion factor: 1km= 0.62mi.
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Transcript of Bellringer 9/15 1.Convert 0.62 miles into meters Conversion factor: 1km= 0.62mi.
Bellringer 9/151. Convert 0.62 miles into meters
Conversion factor: 1km= 0.62mi
Element(ary) my dear Watson
• Element: a substance that cannot be broken down into simpler/other substances– Made of only 1 kind of atom– Atoms are identified based on their atomic
number and mass• Atomic Number: the number of protons in an atom• Atomic Mass: the number of protons + neutrons in an
atom
A Typical box on the periodic table:
The 3 types of Elements
Important Families on the periodic tableColumn and name Characteristics
Alkali metals
Alkali metals
Extremely soft – cut with a butter knifeMost reactive metalsNot found as a pure metal in nature
Alkali earth metals
Alkali earth metals
Soft but not as soft as alkali metalsSecond most reactive metalsNot found as a pure metal in nature but has its uses Magnesium fire starters.
Weekly Writing:
“Why is it important for you to understand the difference between the elements? When will you ever need this in real life?”
1 paragraph with 5 sentences
Due: Friday 9/18
Exit Slip 9/151. How many metals are there?2. How many nonmetals are there?3. How many metalloids are there?
Bellringer 9/161. What are 2 properties of alkali metals?2. What are 2 properties of alkali earth metals?
Important Families on the periodic tableColumn and name Characteristics
Alkali metals
Alkali earth metals
Halogens
Hal
ogen
s
Most reactive nonmetalsCombine with alkali and alkali metals to make Salts like NaClUsed as Disinfectants
Noble Gases
Nob
le G
ases
NO REACTION
Color the Periodic Table Assignment- Each element has two characteristics they can be classified as:
Phase TypeSolid, liquid, or gas Metal, nonmetal, or metalloid
Liquids – Br and Hg
Gases – H, He, N, O, F,
Cl, Ne, Ar, Xe, Kr, Rn
Metal – Every element to the left of the stair step
Nonmetal – Everything to the right of the stair step
Solids- The rest Metalloid (Semiconductors) –
One square right and left of the stair step except for aluminum
The properties of the elementsMetals Nonmetals
Metalloids are in-betw
een The m
ost important is silicon
- Lustre – Shininess
-Malleable – Being able to flatten and bend
-Ductile – Can stretch or be pulled
-Conductive – Heat and Electric
- Dull – no luster
-Brittle – Cracks, fractures, and breaks easily in solid form
-Insulator – Does not allow Heat and Electric to pass
Atomic Radius: distance between 2 nuclei of an element
Exit Slip 9/161. What are the 4 properties of metals?2. What are the 3 properties of non-metals?