Day 5 2-19 Use your colored periodic table: 1.Where are the alkaline earth metals on the periodic table? 2. Neon is a __________. 3.The elements in the.

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Day Use your colored periodic table: 1.Where are the alkaline earth metals on the periodic table? 2. Neon is a __________. 3.The elements in the middle of the periodic table (or the d-block are called the _________________. noble gas transition metals

How is the periodic table arranged?

Metals Excellent conductors (Sea of electrons) even as solids Mobile electrons Metals are malleable and ductile Can be pounded into sheet Can be pulled into wire

Read / review Section 6.2 and complete #s on page 173

Day Most reactive metals = the _______ metals. 2.Least reactive metals = _________. 3.Most reactive nonmetals = ________.

Day Elements with the same # of valence are in the same _______ on the periodic table. alkali metals = __ valence alkaline earth metals = __ valence halogens = __ valence noble gases = __ valence We are taking an ATB quiz on today’s ATBs in 5 minutes.

Periodic Trends Atomic radius: - Measure of size – radius of an atom - Atoms with more electrons do NOT necessarily have a larger atomic radius

Periodic Trends - Atoms with more electrons do NOT necessarily have a larger atomic radius

Periodic Trends - Atoms with more electrons do NOT necessarily have a larger atomic radius 1. Atoms get larger going down a group. 2. Atoms get smaller going across a period So why?...

Periodic Trends - Atoms with more electrons do NOT necessarily have a larger atomic radius As you move down a group you increase the number of energy levels in the atom and so the atom gets larger as expected.

Periodic Trends - Atoms with more electrons do NOT necessarily have a larger atomic radius As you move across a period, # of protons increases and outermost energy level stays the same, the attractive force between elecs. and pros. pulls the atom tighter (closer to nucleus)

Periodic Trends What’s bigger: B or Al B or N N or Zn C or Cl

Read / review Section 6.2 and complete #s on page 173

Day Which halogen is found in period 2? 2.How many valence electrons does calcium have? 3.Why does the size of an atom increase moving down a group?

Red = ? Green = ? Blue = ?

Good Conductors = ?Inert elements = ?

Review 1. What element is in Group 2, Period 3? 2. Name an element in Group 3 3. How many valence electrons in Xe? 4. Give me an element with 1 valence electron.

Partner Review 1. What element is in Group 17, Period 3? 2. What family of elements is the element above in? 3. How many valence electrons does it have?

Periodic Trends What are ions? - atoms that are charged due to the loss or gain of electrons - If an atom loses elecs. it becomes smaller and positive - If an atom gains elecs. it becomes larger and negative Notes page 4

Periodic Trends What are ions? - If an atom loses elecs. it becomes smaller - If an atom gains elecs. it becomes larger PAGE Which elements gain elecs.? Which elements lose elecs.? Pattern?

Periodic Trends Elements on the right side of the periodic table form _________ ions Elements in the same group form ___________ ions negative The same

Periodic Trends What’s bigger: F or F - Na or Na + Na or Rb Na of Al F or Cl -

Day Most reactive metals = the ____________ metals. 2.Elements with the same # of valence are in the same ___________ on the periodic table. 3.Halogens = _____ valence.

Day Most reactive nonmetals = the _________. 2.Elements with the same # of valence are in the same ___________ on the periodic table. 3.Alkali metals = _____ valence.

Day Least reactive metals = the ____________ metals. 2.Elements with the same # of valence are in the same ___________ on the periodic table. 3.Alkaline earth metals = _____ valence.