Valence Electrons and LEDS

• Q: What is an atom?

  A: basic unit of matter with protons, neutrons, and electrons
• T or F: An atom is the smallest particle that has common properties

  A: F
• Q: What is an element?

  A: specific type of atom that has unique number of protons, electrons, and neutrons
• Q: In an atom, which parts are the ones kept in the center?

  A: Protons and neutrons
• Q: In an atom, which parts are the ones orbiting in the outer layers?

  A: electrons
• Q: What group of elements don't seem to mingle or react with any other elements and are termed as inert or stable?

  A: noble gases
• Q: How many electrons do noble gases have in their outer shell?

  A: 8 electrons
• Q: What rule is widely accepted by chemists that elements prefer to have 8 electrons in their valence shell to be stable?

  A: Octet Rule
• Q: What two elements are exempted from the octet rule and how many valence electrons do they need to be stable?

  A: Hydrogen and Helium, 2
• FTB: To become stable is the goal of elements, and the group called __ are mentioned to be stable and inert.

  A: Noble gases
• FTB: _ electrons are electrons on the outer shell of atoms.

  A: valence
• FTB: This rule, __, states that atoms prefer having eight electrons on their valence shell to become stable.

  A: Octet Rule
• Q: What is LEDS?

  A: Visual model showing an element's valence electrons
• Q: What is the full name of LEDS?

  A: Lewis Electron Dot Structure