Radioactivity Ions & Compounds pH, acids, and bases Endo vs Exothemic States of Matter Random Science Stuff $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400 $600 $ 600$600 $ 600 $ 600 $ 600 $800 $ 800$800 $ 800 $ 800 $ 800 $ 1000$1000 $ 1000 $ 1000 $ 1000 $ 1000

Final Jeopardy Final Jeopardy Category Balancing Equations

Final Jeopardy What is Zn + 2 HCl ---  ZnCl 2 + H 2 This the correct balanced equation for the following chemical reaction. Zn + HCl --> ZnCl 2 + H 2

$200 What are a helium nucleus or two protons and two neutrons? Alpha particles are made of these subatomic particles.

$400 What are electrons? Beta particles are made of this subatomic particle.

$600 What is unstable? The nucleus of a radioactive atom is this due to the large number of protons and neutrons inside it.

$800 What is Thorium (Th) because it has an atomic number greater than 83. Of the following elements, this one is more likely to be radioactive because of its atomic number. Neon (Ne), Thorium (Th), or Barium (Ba)?

$1000 What is it changes into a different element? This is what happens when an element releases an alpha or beta particle during radioactive decay.

$200 What is it loses an electron? This is how an element becomes positively charged.

$400 What is Be, Mg, Ca, Sr, Ba, or Ra (anything with a +2 charge)? This element will form in a 1:1 ratio with sulfur (S).

$600 What is substance 2 is ionic and substance 1 is covalent. Substance 1 melts and substance 2 does not melt. This substance is ionic. This substance is covalent.

$800 What is it becomes a Fluorine ion with a -1 charge (F -1 ) This is what a Fluorine atom becomes if it gains an electron.

$1000 What is salt water because it is an ionic substance and ionic substances conduct electricity in solution? Of the following, this one conducts electricity for this reason. The compounds to choose from are salt water or sugar water. Don’t forget the reason.

$200 What is 0 to 6.9 or less than 7? This is the pH range for acids.

$400 What is A.? This answer choice correctly identifies a base. A.Feels slippery B. produces H+ ions in solution C. tastes sour D. turns blue litmus red

$600 What is C. grapes? Of the following, this one is the most acidic substance. A.bananas (pH 4.7) B. celery (pH 5.9) C. grapes (pH 3.0) D. lettuce (pH 6.9)

$800 What is the pH will become more neutral (closer to 7) or the pH value will go down? A student adds hydrochloric acid to ammonia. This is what will happen to the pH of the ammonia.

$1000 What is add a weak base to the water? Fish tank water must be kept at a particular pH level so the fish stay healthy. Your fish tank has a pH of 5. This is what you should add to neutralize the pH of the water.

$200 What is energy is absorbed by the surroundings and the reaction gets colder? This is what happens during an endothermic reaction.endothermic

$400 What is energy is released to the surroundings and the reaction gets hotter? This is what happens during an exothermic reaction.exothermic

$600 What is endothermic because heat is absorbed (heat goes in) and causes the products to feel cold? The following is an example of an endo or exothermic reaction for this reason- the reaction between Vinegar and Baking Soda.

$800 What is endothermic because heat goes into the egg to cook it? The following is an example of an endo or exothermic reaction for this reason- cooking an egg.

$1000 What is exothermic because heat was given off as the products (H 2 O and O 2 ) were made? The following is an example of an endo or exothermic reaction for this reason- the decomposition of H 2 O 2 (Elephant toothpaste).

$200 What is tightly (closely) packed together vibrating next to each other? This is how the molecules in a solid are arranged.

$400 What is the molecules slow down? This is what happens to molecules of a substance as heat is removed.

$600 What is the sauce molecules move faster and get farther apart? Suzie heats spaghetti sauce in a pot on the stove. This is what happens to the molecules in the sauce as the temperature increases.

$800 What is B. According to the illustration above, what happens to water molecules when water is heated? A. Their energy level decreases. B. They move farther apart. C. They move more slowly. D. They stop moving. 0oC0oC 120 o C

$1000 What is a phase change (boiling or melting) b/c temperature doesn’t change? This is what is happening from point A to point B and this is how you know. Temp Energy AB

$200 What is make observations and collect data? This step of the scientific method would be the most critical step to a forensic scientist like those on the TV show CSI.

$400 What is the strong nuclear force? This force in the nucleus is responsible for keeping the protons and neutrons in the center of an atom.

$600 What is 2 Mg + O  2 MgO This is the correct balanced chemical equation for the reaction between Mg and O 2. Mg + O  MgO

$800 What is it was an exothermic reaction because energy (heat and light) was given off as a result of the combustion reaction? The demo with the water jug, rubbing alcohol, and a match was an example of this type of reaction for this reason.

$1000 Daily Double

The electrons would fall into the nucleus and become attracted to the positively charged protons because opposite charges attract. This is what would happen to the electrons if the electromagnetic force that keeps them spinning around the nucleus were lost.

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