reactions periodic table & elements physical chemical changes compounds & mixtures physical...
TRANSCRIPT
Reactions Periodic Table & Elements
Physical Chemical Changes
Compounds & Mixtures
Physical Chemical properties
10 10 10 10 10
20 20 20 20 20
30 30 30 30 30
40 40 40 40 40
50 50 50 50 50
60 60 60 60 80
•This law says that atoms cannot be created or destroyed in a reaction
??10 points
Law of conservation of MASS/MATTER
10 points
•Atoms re-arrange to form new compounds during…?
??
20 points
During a chemical reaction
20 points
• The following is a chemical reaction:
A) Dissolving sugarB) Rusting nailC) Glass meltingD) Alcohol vaporizing
30 points
•B) Nail Rusting
•30 points
•CH4 + 2O2 CO2 + 2H2OThis is a chemical reaction because:A)It is balancedB)A new substance is formedC)It creates a gas and a solidD)There are 2 substances on the
reactant side
40 points
B) A new substance is formed40 points
CH4 + 2O2 CO2 + 2H2O
Why do the O2 and H2O have a “2” in front of them?
50 points
To BALANCE the reaction (same amount of atoms in and out)
50 points
CH4 + 2O2 CO2 + 2H2OWhich is a PRODUCT in this reaction?
A)O2
B)HC)CO2
D)CH4
60 points
•C) CO2
60 points
•These elements are VERY reactive metals:–A) Alkaline Earth Metals–B) Noble gases–C) Transition Metals–D) Alkali Metals
10 points
–D) Alkali Metals
10 points
•These elements are ductile, malleable, conduct heat and electricity, and are useful for building things
20 points
•METALS
•20 points
This metalloid is used in making glass and computer chips:
30 points
Silicon
30 points
This group of nonmetals includes gases that do not react easily with other elements:
40 points
40 points
Noble gases
•Elements MOST closely related to each other are arranged in ______________ on the periodic table.
50 points
50 points
GROUPS
Most of the elements are:A) Natural nonmetalsB) Natural metalsC) Synthetic nonmetalsD) Synthetic metals
60 points
60 points
B) Natural metals
•This type of change causes NEW substances to be formed
10 points
Chemical changes
10 points
•This type of change does not form new substances, and includes phase changes
20 points
Physical Changes
20 points
•Which is PHYSICAL change?A)Iron rustingB)Hydrogen + oxygen waterC)Sulfur and oxygen forming Sulfur dioxideD) Liquid nitrogen becoming a gas at room temperature
30 points
Liquid nitrogen becoming a Gas at room temperature
30 points
When you stir salt into water, you form:
A)A new substanceB)A new compoundC)A solutionD)A new element
40 points
C) A solution
40 points
•Which 2 materials form a new substance when combined?
A)Water and Kool-Aid powderB)Baking soda and vinegarC)Iron nails and penniesD)Salt and pepper
50 points
B) Baking soda and vinegar
50 points
60 points
Which is a CHEMICAL change?
A) spreading mustard
B) mixing spices
C) cutting a lawn
D) making a cake
D) making a cake
60 points
•Compounds are different from mixtures because:
10 points
10 points
COMPOUNDS: chemically attached
MIXTURES: physically mixed, not chemically attached
H2SO4 has ___ total atoms?
20 points
7 atoms inH2SO4
20 points
Which is/are a compound?
A) Berkyllium
B) Hyrogen
C) Propane
D) Water30 points
C) Propane
C3H8
D) Water
30 points
HOW are compounds formed?
40 points
Atoms CHEMICALLY attach to each other
40 points
50 points
A substance is formed from 2 substances physically joined – this is a/an:
A) element
B) mixture
C) compound
D) atom
50 points
B) mixture
What is the chemical formula for GLUCOSE (a
simple sugar)?
60 points
C6H12O6
60 points
•This property explains how tightly packed atoms are
10 points
DENSITY10 points
Soda, sweet tea, and salt water are all what type of matter?
20 points
Homogeneous SOLUTIONS20 points
Water and salt water have different melting and boiling points because...?
30 points
They are different substances.
Every substance has its own M. & B. points
30 points
Water molecules begin to speed up, so that they can now move past each other. What phase transition is occurring?
A) freezing
B) melting
C) evaporating
D) condensing
40 points
B) melting
40 points
Which is/are insoluble in water?
A) sugar
B) sand
C) oil
D) drink mix
50 points
B) sand
C) oil
50 points
Which is a NATURAL HOMOGENEOUS solution?
A) salt
B) soda
C) steel
D) blood
80 points
D) Blood
80 points