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WorksheetsSTAAR Survivor - Chemistry
Total questions: 30
Worksheet time: 22mins
Label the metals, nonmetals and metalloids
metalloids
characteristics of both metals and nonmetals
metals
generally shiny, malleable, ductile, and good conductors of heat and electricity
nonmetals
generally dull, brittle, and poor conductors of heat and electricity
groups/family
vertical columns on the Periodic Table that contain elements with similar properties
period
the horizontal rows of elements on the Periodic Table
Identify which are the products and reactants
The Law of Conservation of Mass states that
compounds and elements are the same
elements can be destroyed
matter cannot be created or destroyed, but can be transformed
mass is the same for all the objects if they need to exist
This change is a
chemical reaction
physical change
musical change
Ice Ice baby
How is a chemical change different from a physical change?
there is no difference
a physical change creates a new substance
a chemical change creates a new substance
Is glass breaking a chemical or physical change?
A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?
Physical change
Chemical change
No change
I. The crystals dissolve
II. A precipitate is formed.
III. The bottom of the beaker feels warm to the touch.
IV. Bubbles begin forming within the water.
All of the observations are evidence of a chemical change EXCEPT –
H2SO4
three hydrogen (H)
one sulfur (S)
four oxygen (O)
Which of the following are properties of a metal: (three answers)
Good conductor of heat and electricity
Brittle (break easily)
Malleable (able to bend without breaking)
Luster (shiny)
Dull
32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water
8
12
24
40
An equation for a chemical reaction is shown.
NaOH + HCl → NaCl + H2O
Which statement provides evidence that mass is conserved in the reaction?
Two new substances are formed in the products.
Water is one of the products, but not one of the reactants.
Two hydrogen atoms are in the reactants, and two hydrogen atoms are in the products.
One chlorine atom pairs with one sodium atom in the products, and one chlorine atom pairs with one hydrogen atom in the reactants.
How does the Law of Conservation of Mass apply to a burning candle?
The amount of wax before the reaction equals the amount of energy afterwards.
The mass of the wick before the reaction equals the mass of the smoke afterwards.
The mass of the wick, wax that burned and the oxygen that helped the flame before the reaction equals the mass of the smoke and the gases released after the reaction.
The mass of the molecules of the candle before the reaction equals the mass of the candle and burned wick after the reaction.
In the following reaction: 2NaN3 decomposes to form 2Na + 3N2. If 500 grams of NaN3 decomposes to form 323 grams of N2. How much Na is produced?
100 grams
177 grams
323 grams
500 gram
