Periodic Table

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

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An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

The atomic number of an element tells the number of _____ in the nucleus of an atom of that element.

• protons
• neutrons
• electrons
• isotopes

Which subatomic particle has a negative charge in the atom?

• proton
• neutron
• electron
• quark

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

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Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

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The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

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A horizontal row of elements in the periodic table.

• column
• group
• period

A vertical column in the periodic table.  Elements share similar properties.

• row
• group
• period

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