Science test Review chapter 3 – Flashcards
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Periodic
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means having a regular, or repeating pattern
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Periodic law
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states that the repeating chemical and physical properties of elements relate to and depend on the elements' atomic number
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Period
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each horizontal row of elements ( from left to right) on the periodic table
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Group
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each column of elements ( from top to bottom) on the periodic table
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Metals
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are elements that are shiny, ductile, malleable, and are good conductors of thermal energy and electrical current
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Nonmetals
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are elements that are not shiny, brittle, unmalleable, and are poor conductors of thermal energy and electrical current
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Metalloids
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are elements that have properties of both metals and nonmetals
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An element that conducts thermal energy easily is likely to be classified on the periodic table as a
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Metal
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Which statement is true?
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Repeating physical properties help Mendeleev organize his periodic table
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On the modern periodic table
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Elements are arranged by increasing atomic number
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A physical property of most nonmetals is that they
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Are poor conductors of electric current
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Which of these is an example of an everyday chemical phenomenon?
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Sulfur in the air reacting with silver to tarnish a spoon
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Mendeleev tried many different arrangements of the elements according to their properties. Which arrangement of elements produces a repeating pattern of properties?
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By atomic mass
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A few elements in Mendeleev's table were not in their correct place according to their properties. How did Moseley change the arrangement?
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He rearranged the elements by atomic number
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Which information is NOT included in each square of the periodic table in your textbook?
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Melting point
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What happens as you move from left to right through each period on the periodic table?
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None of the above
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Which of the following is NOT true of all metals?
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They are all solids are room temperature
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Which of the following describes nonmetals? (Circle all that apply)
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Found to the right of the zigzag line on the periodic law
More than half are gases at room temperature
Are brittle
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After arranging the elements, Mendeleev saw that similar ?and ?properties repeating every ? element
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physical
chemical
8th
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The basis of the periodic table is the periodic ? which states that the repeating chemical and physical properties of elements relate to and ? on the elements atomic ?
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law
depend
number
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. Rows of elements are called ? , and columns of elements are called ? or ?
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period
group
family
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Two rows of metals are place below the periodic table to allow the tale to be narrower. Elements in the ? row are called lanthanides an elements in the ? row are called actinides.
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top
bottom
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The first letter of a chemical symbol is always ? . If there is a second letter, it is always ? .
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capitalized
lowercase
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As you move across each period of the periodic table, the physical and chemical properties of elements gradually ? .
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change
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Based on their properties, elements can be classified as ?, ?, and ?
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metals
nonmetals
metalloids
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What is the common name or this metal compound? Iron oxide
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rust
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Metals on the left side of the periodic table are very ? with oxygen.
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reactive
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combines with oxygen to make chemical that slow the spread of ? in some materials.
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Antimony
fire
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Why is Mendeleev's periodic table important?
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It is important because it keeps all the elements organize by their atomic number, mass and by their properties.
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How is the periodic table like a calendar?
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Because like a calendar the periodic table repeats every 8th elements, every 8th element shares similar properties.
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Describe some physical properties of elements, and identify how they are used to position elements on the periodic table.
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Metals- are shiny, ductile, malleable, good conductor of thermal energy and electrical current, and are placed on the left side of zigzag line.
Nonmetals- dull, brittle, unmalleable, poor conductor of thermal energy an electrical current, and are placed on the right side of the zigzag line.
Metalloids- have properties of metals and nonmetals, are placed along the zigzag line.
