Joey Test Nov 18 Flashcards
What is a Chemical Bond?
Force that holds 2 or more atoms together
What are Valence Electrons Attracted To?
To the Nucleus of another atom
Does a Stable or Unstable Bond have a full valance shell?
Stable has a full valance shell
How many electrons make up a full valance shell
8 electrons
What is a covalent bond?
Electrons shared between atoms
What is a chemical formula?
Chemical symbols & numbers that represent the number of atoms in a compound
What is an Ion?
Atom No Longer electrically neutral
What is an ionic bond?
Metal donates an electron to a non metal
Can you practice drawing a single, double and triple bond?
How draw an Ionic Bond?
What is a metallic bond?
2 or more metals share their electrons
What is difference between ionic and metal bond?
ionic bond donates metal to an electron..metallic bond is when metal shares electrons with another metal
Name 4 Properties of a Metallic Bond
- Solid at room temperature
- High Melting / Boiling Point
- Don’t Disolve
- Good conductor of heat & electricity
What is difference between physical & chemical change?
Physical changes don’t produce a new substance, Chemical Change is one or more substance creating new substance
Is Brownie Batter physical or chemical change?
Chemical Change
What is a chemical change?
one or more substances change into new substance
What are signs of chemical reaction
- change in color
- change in odor
- bubbles form
- precipitation forms
What happens during chemical reaction?
Breaking chemical bonds between reactant molecules and forming new bonds between atoms in product particles
What is the number in front of an element that can be changed called?
Coefficient
What is the little number to the right of element that can not be changed called?
Subscript
What is a combustion reaction?
involves a substance combining with oxygen and releases energy
What is a decomposition reaction?
a compound breaks down for 2 or more substances
What is a single replacement?
When 1 element replaces another element in a compound
What is a double replacement?
Negative ions in 2 compounds switch places forming 2 new compounds
What is a synthesis reaction?
Reaction where 2 or more substances combine and form 1 compound
What happens to energy when you break bonds?
Bonds absorb energy
What happens to energy when you form bonds?
Forming bonds releases energy
What is Endothermic?
Reactions that absorb energy
What is Exothermic Reaction?
Reaction that releases energy
What is activation energy?
The minimum amount of energy needed to start a chemical reaction
What are factors that affect the rate of reaction?
Surface Area / Temperature / Concentration
What are inhibitors?
A substance that slows down or stops a chemical reaction
What is it called when 2 or more metals share electrons
Metallic Bond
What is the minimum amount of energy needed to start a chemical reaction?
Activation Energy
The more particles collide, will the reaction be quicker or slower
quicker
What is Surface Area?
Amount of Are Exposed