The Periodic Table

In his version of the periodic table, Mendeleev based his arrangement of the elements on an element's

• atomic number

• chemical symbol

• name

• atomic mass

The order of elements in the modern periodic table is based on an element's

• atomic number

• chemical symbol

• name

• atomic mass

Elements within the same group in the periodic table have similar properties because they have the same number of

• protons

• neutrons

• ions

• valence electrons

Ionization refers to the process of

• changing from one period to another

• losing or gaining protons

• turning lithium into fluorine

• losing or gaining electrons

Elements that share properties of both metals and nonmetals are called

• ions

• periods

• semiconductors

• valences

Elements in a family often have a similar

• appearance

• atomic mass

• number of total electrons

• number of total protons

Which statement about the alkali metals is correct?

• They are located in the left-most column of the periodic table

• They are extremely nonreactive

• They are usually gases

• They form negative ions with a 1- charge

Which statement about noble gases is correct?

• They form compounds with very bright colors

• They exist as single atoms rather than as molecules

• They are highly reactive with both metals and nonmetals

• They are extremely rare in nature

Group 18 noble gases are relatively inert because

• they readily form positive ions

• they can have either a positive or a negative charge

• their outermost energy level is missing one electron

• their s and p orbitals are filled

Tags

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Which element is a semiconductor?

• carbon

• sodium

• silicon

• uranium