Recap

• Q: How many elements have been discovered?

  A: 118
• Q: What is the periodic table?

  A: organizational table of elements arranged according to its atomic number
• Q: Are periods the horizontal or vertical component in the periodic table?

  A: horizontal
• Q: Are groups/families the horizontal or vertical component in the periodic table?

  A: vertical
• T or F: Each element in each group have similar physical and chemical characteristics which is dependent on their number of valence electrons

  A: T
• Q: What are the four usual data shown in a single tile?

  A: 1. Name of the element

  2. Atomic number

  3. Chemical symbol

  4. Mass number
• Q: Give the names of each data being pointed at

  A: 1. Name of element

  2. Atomic number

  3. Chemical symbol

  4. Mass number

  
• Q: What is the formula used to get the mass number?

  A: A = protons + neutrons
• Q: What is the formula used to get the atomic number?

  A: Z = protons = electrons
• FTB: Atomic mass number is the element's combined _ particles, _ and _

  A: Heavy, protons, neutrons
• FTB: Atomic number of an element is _ to _ and _ on neutral elements

  A: equal, protons, electrons
• Q: Give the data being asked for in the picture below

  A: 1. Mass number

  2. Symbol

  3. Atomic number

  
• Practice: An element has 9 electrons, 9 protons, and 10 neutrons. Find its

  • atomic number
  • atomic mass
  • name of element
  • element symbol

  A: 1. 9

  2. 19

  3. Fluorine

  4. F
• Practice: An element has 12 electrons, 12 protons, and 12 neutrons. Find its

  • atomic number
  • atomic mass
  • name of element
  • element symbol

  A: 1. 12

  2. 24

  3. Magnesium

  4. Mg
• Practice: A certain neutral element has an atomic number of 2, and a mass number of 4. Find its

  • number of protons and electrons
  • number of neutrons
  • name of element

  A: 1. 2

  2. 2

  3. Helium
• Practice: A certain neutral element has an atomic number of 14, and a mass number of 28. Find its

  • number of protons and electrons
  • number of neutrons
  • name of element

  A: 1. 14

  2. 14

  3. Silicon
• Practice: Sodium (Na) was found to weigh 23 amu per atom. Find its

  • atomic number
  • number of protons and electrons
  • number of neutrons

  A: 1. 11

  2. 11

  3. 12
• Practice: Oxygen (O) was found to weigh 16 amu per atom. Find its

  • atomic number
  • number of protons and electrons
  • number of neutrons

  A: 1. 8

  2. 8

  3. 8