Periodic Table HW Quiz

Mendeleev left spaces in his periodic table for three undiscovered elements. What else did he predict about these elements?

• Their atomic numbers

• Their isotopes

• Their radioactivity

• Their properties

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Mendeleev left three spaces in his periodic table. What did these spaces represent?

• Radioactive elements

• Isotopes

• Undiscovered elements

• Unstable elements

The periodic law allows some properties of an element to be predicted based on which of the following?

• The element's color

• The element's symbol

• The number of isotopes the element has

• The element's position in the periodic table

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The element Xe is a (a)   .

The element Sn is a​ (b)   .

The element Sb is a​ (c)   .

• Non-metal
• Metal
• Metalloid

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The element CI is a (a)   while the element Rb is a​ (b)   .

• nonmetal
• metal
• metalloid

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Which of the following is a Noble gas?

• Xe

• Rb

• Sn

• I

• Sb

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Which of the following is a halogen?

• Xe

• Rb

• Sn

• I

• Sb

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Which family of elements consists of soft, silvery, reactive metals, all of which have one electron in an s orbital?

• Alkaline-earth metals

• Transition metals

• Alkali metals

• Metalloids

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Which of the following can be used to determine what period an element is in on the periodic table?

• Density

• State at Room Temperature

• Electron Configuration

• Reactivity

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What similarity do elements in a group or column of the periodic table share?

• They have the same numbers of neutrons.

• The have the same atomic numbers.

• They have the same number of valence electrons

• They have the same atomic masses.

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