Atoms Periodic Table Bonds

The columns in the periodic table are called

• rows

• groups

• valences

• periods

The attractive force that holds two atoms together is called a(n)

• substance

• pheremones

• chemical bond

• glue

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The number of ________ in the atom of an element determines its chemical properties.

• valence electrons

• protons

• electrons

• neutrons

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A(n) ________ shows the number of valence electrons in an atom in pictorial fashion.

• grid

• group

• electron dot diagram

• metal

Because it can either lose or share electrons when it combines with other elements, each ___________ has some of the properties of metals and some of the properties of nonmetals.

• metalloid

• noble gasses

• alkaline

• hydrogen

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An atom's valence electrons are those electrons that have the __________ energy

• slowest

• fastest

• lowest

• highest

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Atoms tend to be stable and _________ if they have eight valence electrons.

• radioactive

• versatile

• nonreactive

• reactive

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The reactivity of a metal depends on how easily it _______ its valence electrons.

• loses

• gains

• switches

• shares

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In the periodic table, the number of valence electrons in each element ____________ from left to right across each period.

• increases

• decreases

• stays the same

• shifts

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Within each __________ in the periodic table, elements have similar properties because they have the same number of valence electrons.

• group

• row

• space

• period

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