4 - 2 Representative Elements

4 - 2 Representative Elements

4 2 Representative Elements Group 1 Alkali Metals Silvery in color

Fr is the most reactive in this group Tend to bond with group 17 Group 2

Alkaline Earth Metals Not as reactive as group 1 Be is found in gem stones Mg is found in chlorophyll Ca is found in bones Tends to bond with group 16 Group 13

Boron Group B is used in cookware Al is used as a substitute for steel Ga will melt in your hand Tends to bond with group 15 Group 14

Carbon Group C is found in the lead of a pencil, diamonds, all living organisms Si is found in sand, glass, computer chips Semiconductors does not conduct electricity as well as a metal, but better than a nonmetal.

Si is a semiconductor ( most metalloids are ) Group 15 Nitrogen Group N makes up 80 % of the air that we

breathe Group 16 Oxygen group O makes up about 17 % of the air

we breathe. S is used to make sulfuric acid, which is important in manufacturing many products. Se conducts electricity when exposed to light Group 17

Halogens Halogen salt former. F is the most reactive. Br is a liquid Group 18

Noble Gases They rarely combine ( bond ) with other elements. He is less dense than air Most are used in neon lights Rn is a radioactive gas that can get in homes and cause cancer

Recently Viewed Presentations

  • Software Development Life Cycle (SDLC)

    Software Development Life Cycle (SDLC)

    A framework that describes the activities performed at each stage of a software development project. Waterfall Model Requirements - defines needed information, function, behavior, performance and interfaces. Design - data structures, software architecture, interface representations, algorithmic details.
  • Year 9 Design

    Year 9 Design

    Introduce the quotation with a complete sentence and a colon. In To Kill a Mockingbird, Scout learns to have a new respect for her father, even though he does not seem to fit the traditional idea of "brave": "It was...
  • TOW 2A & TOW 2B STOCKPILE Serviceable Tactical Inventory

    TOW 2A & TOW 2B STOCKPILE Serviceable Tactical Inventory

    Contractor Logistics Support PM-CCMS and Raytheon Teaming for Success ITAS Reduces Support Footprint and Cost CLS 5 Year Contract Strategy ITAS Reduces Support Footprint and Cost CLS 5 Year Contract Strategy One for One Replacement of the Ground TOW 2...
  • Benefits Realization Creating Value vs. Triple Constraint www.wmpmi.org

    Benefits Realization Creating Value vs. Triple Constraint www.wmpmi.org

    War Room Mentality - play fair, but never lose sight of the goal to win. Rewards for Performance - encourage productivity and efficiency and rewards for jobs well done. Everyone is Important - atmosphere of dignity and diversity, appreciate each...
  •  Word: Benevolent  Part of speech: Adjective  Pronunciation: buh-nev-uh-luh

    Word: Benevolent Part of speech: Adjective Pronunciation: buh-nev-uh-luh

    Word: Benevolent Part of speech: Adjective Pronunciation: buh-nev-uh-luh nt Origins: Latin "bene" (well; good) + "vol" (wish) Related Forms: Benevolence (n ...
  • Why Do Mitigation Planning - #1

    Why Do Mitigation Planning - #1

    Images are stored as tiles. Tiles at county boundaries may be combined for greater storage and performance efficiency. Clients connect to the cache server instead of the agent server. The cache server constructs the requested image from pre-fetched tiles.
  • ncepem coala cu un numr de senzaie!!! IMA

    ncepem coala cu un numr de senzaie!!! IMA

    Cele 160 lucrari practice sunt grupate in mai multe capitole cu fise de lucru Tehnici de laborator Citologie Histologie...etc.. Este o carte de lux gen biblioraft, se pot adauga diverse notite... Lucr─âri practice de Biologie PRET PROMO 79 lei Sinteze...
  • Computer Network and Design

    Computer Network and Design

    IP Addressing. Facilitates the routing of packets over the network. Uses logical addresses known as IP address (32-bit IPv4). Every host, computer, networking device, or peripheral connected to the internet has a unique 32-bit IP address that identifies it.