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WorksheetsChemistry Review
Total questions: 15
Worksheet time: 15mins
Elements have the most similar properties if they are in the same _______?
Periods
Groups
Rows
Blocks
What type of elements does the image show?
Metals
Nonmetals
Gases
Metalloids
Which physical property would most likely be a nonmetal
Good conductor
Ductile
Brittle
Shiny
Which is the best estimate of the melting point of Rubidium (Rb)?
25* C
40* C
75* C
184* C
Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?
Some of the atoms during the reaction escaped into the air.
Some of the atoms during the reaction were destroyed.
Some of the atoms during the reaction became heavier.
Some of the atoms during the reaction changed to a different kind of atom.
This is a chemical reaction for the decomposition of carbonic acid into water and carbon dioxide. How does this reaction support the Law of Conservation of Mass?
Several molecules of water are produced.
The mass of carbon atoms is reduced during the reaction.
The mass of the atoms in the reactant equals the mass of the atoms in the products.
The mass of hydrogen atoms is the only thing that remains the same before and after the reaction.
Which statement is true about a chemical reaction?
The physical states of the atoms in the reactants determine the products.
Some of the atoms in the reactants will be a part of the products.
The number of atoms in the reactants determines the products.
All of the atoms in the reactants will be a part of the products.
Which best describes the sequence o the elements in Period 5 of the periodic table?
highly reactive gases, relatively non reactive metals, metalloids, very nonreactive gases, nonreactive nonmetals
highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmentals, reactive gases
nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases
nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases
Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?
group 1
group 2
group 16
group 18
Which chemical equation best represents the Law of Conservation of Mass?
H + O → H2O
H2 + O2 → H2O
2H2 + O2 → 2H2O
H2 + O2 → 2H2O2
A table that lists all of the known elements and groups them into columns by important shared properties.
(a)
A single particle of a pure substance.
(a)
What is the primary reason for the high reactivity of alkali metals?
They have a full outer electron shell.
They have one electron in their outer shell.
They have a high atomic mass.
They have a high electronegativity.
Which of the following best describes an endothermic reaction?
A reaction that releases heat to the surroundings.
A reaction that absorbs heat from the surroundings.
A reaction that occurs without any temperature change.
A reaction that produces light.
What is the role of a catalyst in a chemical reaction?
It increases the temperature of the reaction.
It decreases the activation energy of the reaction.
It changes the products of the reaction.
It is consumed in the reaction.
