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Final Review/Kobi Flashcards | StudBud
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Final Review/Kobi
Final Review/Kobi
20 terms
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StudBud Administration
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Physical science
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
How is hardness tested?
Dropped on the floor.
Someone bits it.
Hit with a hammer.
By being scratched.
2
What kinda reaction type is this? 3NaN3(s)-> 2Na(s) + 3N
2
(g)
Double-Replacement
Decomposition
Combustion
Single-Replacment
3
Were dose the atomic number increase from?
top to bottom
vertical
upsidedown
left to right
4
How many Elements are on the periodic table?
118
100
123
239
5
Is Matter a pure substance?
YES!!!
NO!!!
6
What is the definition of standard measurement?
Quantity
Time
Measurement for all scientific measurement 7 SI base units.
Temperature
7
What Classes of elements are their?
Gold,copper,helium
Solid,Liquid,Gas
lead,argon,nickle
Tin,mercury,carbon
8
What is the structure of the atom?
Negative charge
Subatomic Particles
Nucleus
Protons
9
What is the weight of the ethyl alcohol that exactly fills a 200.0 ML container?
The density ethyl alcohol is o.789 g/ML
The density ethyl alcohol is 6.897 ML
The density ethyl alcohol is 1.131 g
The density ethyl alcohol is 1.132÷8.989 g/ML
10
How many groups are their on the periodic table?
16
12
22
18
11
What is the Law of conservation of mass?
Mass of object
total mass of reactants
Chemical property
Mass is not created/destroyed in chemical/physical reactions
12
There are 5 types of reactions.
TRUE!
FALSE!
13
What is an Erlenmeyer flask used for?
Used to hold and heat solid chemicals.
Used to support the iron ring and test tube clamp.
It's used for holding liquid no measuring.
Use for holding liquids also used to gently mix by swirling.
14
When dose Physical change occur?
Produce a change in the compostion
Solid that forms and separates from a liquid mixture.
When properties of materials change but substance stays same
Combines chemically with another substance.
15
Types of mixtures?
Heterogeneous
Mercury
Homogeneous
compounds
16
What is a Scientific theory?
Includes all data and results.
A statement about what happens in nature & and is all truth
Explanation of things based on observations & investigation.
Evolution plate tectonics.
17
What is a chemical Equation?
Under goes changes
It tells you the substance before and after the reaction.
New substance formed
A chemical change
18
What is volume equal to?
Volume= Density
Volume=4cm3 Mass=16g
Volume=25ml÷Mass=50Kg
Volume=1mg mass=2mg
19
when was Emest Rutherford in his prime?
2000-2012
1909-1920
1937-1993
1623-1745
20
What group is alkali metals in?
Group 3A
Group 5A
Group 8A
Group 1A
