Reactions Periodic Table & Elements Physical Chemical Changes Compounds & Mixtures Physical Chemical properties
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 sugar B) Rusting nail C) Glass melting D) Alcohol vaporizing 30 points
B) Nail Rusting 30 points
CH 4 + 2O 2 CO 2 + 2H 2 O This is a chemical reaction because: A)It is balanced B)A new substance is formed C)It creates a gas and a solid D)There are 2 substances on the reactant side 40 points
B) A new substance is formed 40 points
CH 4 + 2O 2 CO 2 + 2H 2 O Why do the O 2 and H 2 O have a “2” in front of them? 50 points
To BALANCE the reaction (same amount of atoms in and out) 50 points
CH 4 + 2O 2 CO 2 + 2H 2 O Which is a PRODUCT in this reaction? A)O 2 B)H C)CO 2 D)CH 4 60 points
C) CO 2 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
Noble gases
Elements MOST closely related to each other are arranged in ______________ on the periodic table. 50 points
GROUPS
Most of the elements are: A) Natural nonmetals B) Natural metals C) Synthetic nonmetals D) Synthetic metals 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 rusting B)Hydrogen + oxygen water C)Sulfur and oxygen forming Sulfur dioxide D) 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 substance B)A new compound C)A solution D)A new element 40 points
C) A solution 40 points
Which 2 materials form a new substance when combined? A)Water and Kool-Aid powder B)Baking soda and vinegar C)Iron nails and pennies D)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
60 points
Compounds are different from mixtures because: 10 points
COMPOUNDS: chemically attached MIXTURES: physically mixed, not chemically attached
H 2 SO 4 has ___ total atoms? 20 points
7 atoms in H 2 SO 4 20 points
Which is/are a compound? A) Berkyllium B) Hyrogen C) Propane D) Water 30 points
C) Propane C 3 H 8 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
C 6 H 12 O 6 60 points
This property explains how tightly packed atoms are 10 points
DENSITY 10 points
Soda, sweet tea, and salt water are all what type of matter? 20 points
Homogeneous SOLUTIONS 20 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