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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

Mr. Royer’s Unit 14 & 15 Review

“Chemical Bonding” and “Chemical Reactions” flashcards


Question
Question

Most elements want to find “happiness” by…


Answer
Answer

Chemically bonding with other elements


Question1
Question

Gas bubbles is an indication that a…


Answer1
Answer

A chemical reaction (chemical change) has occurred.


Question2
Question

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


Answer2
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


Question3
Question

A chemical bond is…


Answer3
Answer

A force that brings elements together to create compounds.


Question4
Question

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


Answer4
Answer

A physical change has occurred.

Example: glass bottle is dropped and hits the floor, shattering into pieces –its still glass!


Question5
Question

Which sub-atomic particle is responsible for chemical bonds?


Answer5
Answer

Electrons


Question6
Question

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


Answer6
Answer

Chemical change has occurred.


Question7
Question

Compounds and molecules are formed through…


Answer7
Answer

Chemical reactions!


Question8
Question

Ice changing to water is an example of a…


Answer8
Answer

A physical change

Nothing new created here, just changing its shape!


Question9
Question

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


Answer9
Answer

8

8 is the magic number of chemistry!!!


Question10
Question

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


Answer10
Answer

Chemical change


Question11
Question

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


Answer11
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!


Question12
Question

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


Answer12
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!!


Question13
Question

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


Answer13
Answer

Chemical change

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


Question14
Question

What is the “octet rule” of chemistry?


Answer14
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.


Question15
Question

How are electrons distributed in an ionic bond?


Answer15
Answer

Electrons are transferred between elements


Question16
Question

What type of elements comprise an ionic bond?


Answer16
Answer

Must have 1 metal and 1 non-metal


Question17
Question

What type of bond happens between metal elements?


Answer17
Answer

Metallic bond

Metal + metal = metallic


Question18
Question

What type of bond happens between non-metal elements?


Answer18
Answer

Covalent bond


Question19
Question

How are electrons distributed among elements in a covalent bond?


Answer19
Answer

The electrons are shared.


Question20
Question

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


Answer20
Answer

Non-polar

Think:

Polar = pull (uneven share)

Non = no

Non-polar = no pull

Its kinda backwards, but that’s what it means!


Question21
Question

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


Answer21
Answer

Chemical change


Question22
Question

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


Answer22
Answer

Chemical!

Light/heat/fire emitted

Color change

Can’t get it back to the original product (new product after)


Question23
Question

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


Answer23
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


Question24
Question

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


Answer24
Answer

Ionic bonds –charges cancel out

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

Anion = Negative

Cation = Positive


Question25
Question

Single, double, and triple shared pairs happen amongst…


Answer25
Answer

Covalent bonds


Question26
Question

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


Answer26
Answer

Ionic bonds


Question27
Question

What type of bond creates a molecule?


Answer27
Answer

Covalent bond


Question28
Question

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


Answer28
Answer

Covalent bonds


Question29
Question

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


Answer29
Answer

Polyatomic bond

Poly = many


Question30
Question

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


Answer30
Answer

Ionic bond

1 metal + 1 non-metal


Question31
Question

What type of bond will happen between Copper & Zinc?


Answer31
Answer

Metallic bond

Metal + metal


Question32
Question

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


Answer32
Answer

Covalent bond

Non-metal + non-metal

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


Question33
Question

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


Answer33
Answer

Ionic Bond


Question34
Question

What type of bond would happen between…

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


Answer34
Answer

Ionic bond

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


Question35
Question

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


Answer35
Answer

Covalent bond

ALL non-metal elements


Question36
Question

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


Answer36
Answer

Chemical change


Question37
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…


Answer37
Answer

An endothermic reaction

Endo = in = enter


Question38
Question

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


Answer38
Answer

A chemical change

Noticing a pattern here?!?


Question39
Question

How many reactants are present in this chemical equation?

H + Li + Na + N HLiNaN


Answer39
Answer

4

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


Question40
Question

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


Answer40
Answer

Product


Question41
Question

How many elements are present in this compound?

4H3P


Answer41
Answer

2…Hydrogen(H) and Phosphorus (P)


Question42
Question

How many total atoms are present in this atom?

4H3P


Answer42
Answer

16

4 x the 3 H = 12 +

4 x the 1 P = 4 … =16


Question43
Question

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


Answer43
Answer

Balanced, even, or equal


Question44
Question

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


Answer44
Answer

Exothermic reaction

Ex = out = exit

Thermic = heat


Question45
Question

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


Answer45
Answer

A synthetic reaction

A + B + C = ABC

Let the plus signs guide you


Question46
Question

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


Answer46
Answer

A catalyst


Question47
Question

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


Answer47
Answer

Replacement (or displacement) reaction

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


Question48
Question

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


Answer48
Answer

Activation energy

To activate is to start


Question49
Question

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


Answer49
Answer

To slow, or stop, a chemical reaction.


Question50
Question

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


Answer50
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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