Advertisement
/ 8 []

Slideshow about Valence Electrons & Bohr Diagrams


Atomic Structure. Atoms have a nucleus that contains Protons and NeutronsElectrons are contained in shells that surround the nucleusAn atom is made of mostly empty spaceProtons have a positive chargeElectrons have a negative charge Neutrons are Neutral. Valence Electrons. Each electron shell ca

Download Presentation

Valence Electrons Bohr Diagrams

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use only and may not be sold or licensed nor shared on other sites. SlideServe reserves the right to change this policy at anytime.While downloading, If for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.











- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -




Presentation Transcript


Valence electrons bohr diagrams l.jpg

Valence Electrons & Bohr Diagrams


Atomic structure l.jpg

Atomic Structure

  • Atoms have a nucleus that contains Protons and Neutrons

  • Electrons are contained in shells that surround the nucleus

  • An atom is made of mostly empty space

  • Protons have a positive charge

  • Electrons have a negative charge

  • Neutrons are Neutral


Valence electrons l.jpg

Valence Electrons

  • Each electron shell can hold a certain number of electrons

  • Electron shells are filled from the inside out

  • Noble Gases have full outer electron shells

  • All other elements have partiallyfilled outer electron shells


Valence electrons4 l.jpg

Valence Electrons

  • The electrons in the outer most electron shell are called valence electrons

  • The shell containing electrons that is furthest from the nucleus is called the valence shell

  • The number of electron shells with electrons is the same as the period number


Noble gas stability l.jpg

Noble Gas Stability

  • Noble gases are usually unreactive

  • This is because they have full valence shells

  • An element with a full valence shell is a happy element 

  • For two atoms to join together atoms must gain, lose or share electrons

  • Elements with full valence shells do not easily gain or lose electrons


Noble gas stability6 l.jpg

Noble Gas Stability

  • Atoms want to gain stability

  • Atoms will try to gain or lose electrons to have a full valence shell

  • Metals try to lose electrons

  • Non-Metals try to gain electrons


Becoming an ion l.jpg

Becoming An Ion

  • Electrons are negatively charged

  • Protons are positively charged

  • Neutral atoms do not have a charge because the number of protons is the same as the number of electrons

  • When atoms gain or lose electrons they become positively or negatively charged

  • An atom with a charge is called an Ion


Bohr models l.jpg

Bohr Models

  • Niels Bohr created a visual model of the atom to make them easy to understand

  • A Bohr Model contains a central nucleus surrounded by electron shells

  • For each model you state the number of protons and neutrons in the nucleus and draw a dot on the electron shells for each electron