Show:
Physical Properties
KMT
LCM
Atoms/Elements
Chemical Reactions
100
Name three physical properties matter could have...
Ms. Andrews will check answer.
100
What does the KMT stand for?
Kinetic Molecular Theory
100
What does the LCM stand for?
Law of Conservation of Mass
100
Do atoms have mass? If so, where is it located?
Yes. The nucleus.
100
Name three indicators of a chemical reaction?
Ms. Andrews will check.
200
Describe a penny using three physical properties of matter.
Ms. Andrews will check answers.
200
How do atoms move?
Atoms move in constant random motion.
200
Name one way a person can prove the LCM.
Balance chemical equation OR conduct an experiment and measure mass before and after the reaction.
200
What is another word for an element?
Pure substance
200
What type of chemical reaction involves explosions, burning, or freezing?
Exothermic Reaction
300
If a substance is viscous, what do I mean by that?
It can be poured.
300
When energy is taken away from matter, how will the atoms behave?
The atoms will slow down and come closer together.
300
Explain how the atoms behave when an ice cube turns into a puddle of water.
Energy is absorbed and atoms move faster and spread out, eventually changing states of matter.
300
How are atoms organized on the Periodic Table?
By number of protons
300
What is the definition of a chemical change?
Change in form and matter.
400
What is the definition of a physical property?
A property that can be measured without changing the matter.
400
Do all atoms have the same melting point, boiling point, or freezing point?
No.
400
When energy changes, the movement of _______ changes.
Atoms
400
Which group on the Periodic Table of Elements is least reactive?
Noble Gases
400
A plant growing by absorbing the sun's energy is an example of which type of chemical reaction?
Endothermic Reaction
500
Is burning a physical property? Explain why or why not?
No. It changes the chemical make-up of the matter.
500
How does energy affect density of matter?
When engery increases, density decreases. Visa versa.
500
2 NaCl + 1 BeF2 --> 2 NaF + 1 BeCl2 Does this prove the LCM? How?
Yes. Mass before and after the chemical equation are the same.
500
If an element has 3 valence electrons, how is it going to behave when it gets close to an atom with 5 valence electrons?
They will bond ionically.
500
When a chemical reaction occurs what is released or absorbed by bonds occuring or breaking apart?
Energy