Mr. Royer’s Unit 14 & 15 Review

Mr. Royer’s Unit 14 & 15 Review “Chemical Bonding” and “Chemical Reactions” flashcards

Question Most elements want to find “happiness” by…

Answer Chemically bonding with other elements

Question Gas bubbles is an indication that a…

Answer A chemical reaction (chemical change) has occurred.

Question Chemical changes create “new” matter, but what is really happening is…

Answer A “rearrangement” of elements amongst compounds. Use this comparison…there are 52 cards in a deck, a chemical change just means we reshuffled the cards around into a new order

Question A chemical bond is…

Answer A force that brings elements together to create compounds.

Question When matter changes its shape, but retains (keeps) it’s chemical properties we know…

Answer A physical change has occurred. Example: glass bottle is dropped and hits the floor, shattering into pieces –its still glass!

Question Which sub-atomic particle is responsible for chemical bonds?

Answer Electrons

Question When two substances interact and a color change occurs we know a…

Answer Chemical change has occurred.

Question Compounds and molecules are formed through…

Answer Chemical reactions!

Question Ice changing to water is an example of a…

Answer A physical change Nothing new created here, just changing its shape!

Question Between elements, how many electrons are shared/transferred to make a bond?

Answer 8 8 is the magic number of chemistry!!!

Question Light, fire, or heat indicates what type of change has occurred?

Answer Chemical change

Question What does “valence” in valence electron(s) mean?

Answer Furthest away from nucleus AND the electrons that dictate how an element bonds with others The Noble Gasses all have 8 valence electrons, so they don’t bond with any other element!

Question What’s the easiest way to determine how many valence electrons an element has?

Answer Use the “A-series” number! 1A = 1 valence electron 2A = 2 valence electrons…and so on 8A is the max and 8 is the “magic number” of chemistry!!

Question You cannot “undo” the product of what type of change?

Answer Chemical change Ya can’t undo what’cha done did. Na-mean?

Question What is the “octet rule” of chemistry?

Answer Elements transfer or share electrons in order to achieve 8 valence electrons between them (create stability). Successful electron dot diagrams show an “octagon” when the dots are connected.

Question How are electrons distributed in an ionic bond?

Answer Electrons are transferred between elements

Question What type of elements comprise an ionic bond?

Answer Must have 1 metal and 1 non-metal

Question What type of bond happens between metal elements?

Answer Metallic bond Metal + metal = metallic

Question What type of bond happens between non-metal elements?

Answer Covalent bond

Question How are electrons distributed among elements in a covalent bond?

Answer The electrons are shared.

Question In a covalent bond, when the electrons are shared equally the covalent bond is said to be…

Answer Non-polar Think: Polar = pull (uneven share) Non = no Non-polar = no pull Its kinda backwards, but that’s what it means!

Question When two substances react and a solid (precipitate) is produced, then a what type of change has occurred?

Answer Chemical change

Question What type of change (physical or chemical) does a firework best exemplify?

Answer Chemical! Light/heat/fire emitted Color change Can’t get it back to the original product (new product after)

Question What is happening amongst the shared electrons of a polar covalent bond?

Answer Uneven sharing Polar = uneven pull Mathematically, it must be 7 + 1 = 8 valence electrons 6 + 2 = 8 valence electrons 5 + 3 = 8 valence electrons

Question What type of bond (ionic or covalent) becomes “neutral” when elements combine?

Mr. Royer’s Unit 14 & 15 Review