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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.

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Mr. Royer’s Unit 14 & 15 Review

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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?


Answer

Ionic bonds –charges cancel out

Remember, only covalent bonds can be polar (has a +/-charge due to uneven sharing)

Anion = Negative

Cation = Positive


Question

Single, double, and triple shared pairs happen amongst…


Answer

Covalent bonds


Question

Crystal structures, high melting points, and electrical conductivity belong to what bond type?


Answer

Ionic bonds


Question

What type of bond creates a molecule?


Answer

Covalent bond


Question

Definite & predictable shapes along with low melting points belong to which bond type?


Answer

Covalent bonds


Question

What bond type happens between a large quantity of covalently bonded elements?


Answer

Polyatomic bond

Poly = many


Question

What type of bond will occur between Lithium (Li) and Fluorine (F)?


Answer

Ionic bond

1 metal + 1 non-metal


Question

What type of bond will happen between Copper & Zinc?


Answer

Metallic bond

Metal + metal


Question

What type of bond would happen between Hydrogen (H) and Fluorine (F)?


Answer

Covalent bond

Non-metal + non-metal

Remember, Hydrogen is the ONLY non-metal element on the metal side of the P. Table


Question

What type of bond type creates a true “compound?”


Answer

Ionic Bond


Question

What type of bond would happen between…

Nitrogen (N) + Lithium (Li) + Hydrogen (H) + Sodium (Na)?


Answer

Ionic bond

At least 1 metal AND 1 non-metal are present.


Question

CH4 would be an example of an ionic or covalent bond?


Answer

Covalent bond

ALL non-metal elements


Question

What type of change, physical or chemical, demonstrates new chemical properties in the matter observed?


Answer

Chemical change


Question

During an apparent chemical change, energy in the form of heat, is absorbed by the reactants. This type of chemical reaction is known as…


Answer

An endothermic reaction

Endo = in = enter


Question

A chemical equation is a short hand way of illustrating what type of change?


Answer

A chemical change

Noticing a pattern here?!?


Question

How many reactants are present in this chemical equation?

H + Li + Na + N HLiNaN


Answer

4

4 separate elements (can be compounds too) are on the LEFT side of the arrow


Question

What is the name for the matter produced in a chemical reaction?


Answer

Product


Question

How many elements are present in this compound?

4H3P


Answer

2…Hydrogen(H) and Phosphorus (P)


Question

How many total atoms are present in this atom?

4H3P


Answer

16

4 x the 3 H = 12 +

4 x the 1 P = 4 … =16


Question

Since we cannot create or destroy matter, we know a chemical reaction must be this on both sides of the reaction?


Answer

Balanced, even, or equal


Question

When a reaction releases heat, as seen with a fire, during a chemical reaction we term this as a …


Answer

Exothermic reaction

Ex = out = exit

Thermic = heat


Question

What classification of a reaction takes multiple reactants and combines them into 1 complex product?


Answer

A synthetic reaction

A + B + C = ABC

Let the plus signs guide you


Question

What is the term for the energy that speeds up a reaction?


Answer

A catalyst


Question

What type of classification is denoted when elements swap spots, once or twice, during a reaction?


Answer

Replacement (or displacement) reaction

One, or two, elements are replacing each other after a reaction.


Question

What do we call the minimum amount of energy required to start a chemical reaction?


Answer

Activation energy

To activate is to start


Question

What is an inhibitor’s job in a chemical reaction?


Answer

To slow, or stop, a chemical reaction.


Question

When compounds breakdown into smaller or multiple products we classify this reaction as…?


Answer

A decomposition reaction.

ABC = A + B + C

Or

ABC = A + BC …either way there are more products than reactants!!!

The plus signs are only on the product side


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