{
 "source": "https://peabody.kids/flashcards/chem-element-facts",
 "id": "chem-element-facts",
 "title": "Element Facts",
 "category": "science",
 "subject": "Chemistry",
 "levels": [
  "3-5",
  "6-8",
  "9-12"
 ],
 "description": "Fun and useful facts about well-known elements.",
 "tags": [
  "periodic table",
  "elements"
 ],
 "frontLabel": "Question",
 "backLabel": "Answer",
 "cards": [
  [
   "Which element is the lightest and most common in the universe?",
   "Hydrogen"
  ],
  [
   "Which gas makes up about 78% of Earth's air?",
   "Nitrogen"
  ],
  [
   "Which gas do we breathe in to live, about 21% of the air?",
   "Oxygen"
  ],
  [
   "Which element is the basis of all known life?",
   "Carbon"
  ],
  [
   "Which two forms of pure carbon are very different: one soft and one super hard?",
   "Graphite and diamond"
  ],
  [
   "Which noble gas is used to fill party balloons that float?",
   "Helium"
  ],
  [
   "Which element is the only metal that is liquid at room temperature?",
   "Mercury"
  ],
  [
   "Which element has the symbol Au and is a shiny yellow metal?",
   "Gold"
  ],
  [
   "Which metal is used in most electrical wires?",
   "Copper"
  ],
  [
   "Which metal is the main ingredient of steel?",
   "Iron"
  ],
  [
   "Which element do bones and teeth need, found in milk?",
   "Calcium"
  ],
  [
   "Which element is in table salt along with chlorine?",
   "Sodium"
  ],
  [
   "Which gas is used to disinfect swimming pools?",
   "Chlorine"
  ],
  [
   "Which noble gas glows red-orange in signs?",
   "Neon"
  ],
  [
   "Which element is the most common metal in Earth's crust?",
   "Aluminum"
  ],
  [
   "Which element is the second most common in Earth's crust, found in sand and glass?",
   "Silicon"
  ],
  [
   "Which element is used in computer chips?",
   "Silicon"
  ],
  [
   "Which metal is a good conductor and is used for jewelry and mirrors, symbol Ag?",
   "Silver"
  ],
  [
   "Which element makes matches burn and is found in DNA?",
   "Phosphorus"
  ],
  [
   "Which yellow solid smells like rotten eggs in some compounds?",
   "Sulfur"
  ],
  [
   "Which element helps prevent tooth decay in toothpaste?",
   "Fluorine, as fluoride"
  ],
  [
   "Which element is needed in the thyroid gland and is added to table salt?",
   "Iodine"
  ],
  [
   "Which element is at the center of the Sun's fuel and fuses into helium?",
   "Hydrogen"
  ],
  [
   "Which element is the second most abundant in the universe?",
   "Helium"
  ],
  [
   "Which element is the hardest natural material (a form of carbon)?",
   "Diamond, which is carbon"
  ],
  [
   "Which metal is used to coat steel to stop rust, as in galvanizing?",
   "Zinc"
  ],
  [
   "Which heavy, soft metal is used in car batteries?",
   "Lead"
  ],
  [
   "Which element has the highest atomic number that occurs naturally in large amounts in Earth's crust?",
   "Uranium (92)"
  ],
  [
   "Which element is named after the Sun's Greek name Helios?",
   "Helium"
  ],
  [
   "Which metal is attracted to magnets and is the core of Earth?",
   "Iron"
  ],
  [
   "Which light metal is used for airplane parts and soda cans?",
   "Aluminum"
  ],
  [
   "Which bright white metal burns with a dazzling flame and is in fireworks and flares?",
   "Magnesium"
  ],
  [
   "Which metal is soft enough to cut with a knife and reacts violently with water?",
   "Sodium"
  ],
  [
   "Which element is the N in fertilizer labels like N-P-K?",
   "Nitrogen"
  ],
  [
   "Which metal is mixed with copper to make bronze?",
   "Tin"
  ],
  [
   "Which element is a purple-black solid that turns into purple vapor when heated?",
   "Iodine"
  ],
  [
   "Which noble gas is used in light bulbs to protect the filament?",
   "Argon"
  ],
  [
   "Which element is named for Poland, the homeland of Marie Curie?",
   "Polonium"
  ],
  [
   "Which element was named after Marie and Pierre Curie?",
   "Curium"
  ],
  [
   "Which element is named after Albert Einstein?",
   "Einsteinium"
  ],
  [
   "Which element is named after Dmitri Mendeleev?",
   "Mendelevium"
  ],
  [
   "Which element is named after Niels Bohr?",
   "Bohrium"
  ],
  [
   "Which element is named after planet Neptune?",
   "Neptunium"
  ],
  [
   "Which element is named after planet Uranus?",
   "Uranium"
  ],
  [
   "Which element is named after the Greek word for \"green\"?",
   "Chlorine (from chloros)"
  ],
  [
   "Which element is named after the state of California?",
   "Californium"
  ],
  [
   "Which element is named after Selene, the Greek moon goddess?",
   "Selenium"
  ],
  [
   "Which element is used to make the strongest magnets, the neodymium kind?",
   "Neodymium"
  ],
  [
   "Which element is the most electronegative?",
   "Fluorine"
  ],
  [
   "Which element is a green poisonous gas used long ago and in swimming pools?",
   "Chlorine"
  ],
  [
   "Which metal is the best conductor of electricity?",
   "Silver"
  ],
  [
   "Which element makes up the largest part of the human body by mass?",
   "Oxygen"
  ],
  [
   "What is the most abundant element in the human body by number of atoms?",
   "Hydrogen"
  ],
  [
   "Which element is liquid at room temperature besides mercury, a reddish-brown liquid?",
   "Bromine"
  ],
  [
   "Which element has the symbol Pt and is very valuable and does not tarnish?",
   "Platinum"
  ],
  [
   "Which metal has the highest melting point of all metals?",
   "Tungsten"
  ],
  [
   "Which element is used in the filaments of old light bulbs?",
   "Tungsten"
  ],
  [
   "Which element is a radioactive gas found in some basements?",
   "Radon"
  ],
  [
   "Which element is used in nuclear power plants as fuel?",
   "Uranium"
  ],
  [
   "Which element is the first in the noble gas family?",
   "Helium"
  ],
  [
   "Which element is a shiny gray solid that is a metalloid and used in solar panels?",
   "Silicon"
  ],
  [
   "Which element makes the flame of some fireworks red?",
   "Strontium"
  ],
  [
   "Which element makes the flame of some fireworks green?",
   "Barium"
  ],
  [
   "Which element makes the flame of some fireworks blue?",
   "Copper"
  ],
  [
   "Which element is in chlorophyll at the center of the molecule?",
   "Magnesium"
  ],
  [
   "Which element is at the center of hemoglobin and helps carry oxygen in blood?",
   "Iron"
  ]
 ]
}