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?