Unit 3-Periodic Table Review

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.

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

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Most of the mass of an atom is found it its _____.

• electron cloud
• nucleus
• atomic number
• empty space

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Which subatomic particle has a negative charge in the atom?

• proton
• neutron
• electron
• quark

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

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Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

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Which is an alkali metal?

• Magnesium
• Iron
• Sodium
• Europium

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If an atom had the same properties as fluorine (F), it would probably be located in

• period 1.
• period 2.
• group 2.
• group 17.

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Atoms with similar properties are most likely located...

• in the same period.
• in the same group.
• in different periods.
• to the right and left of each other.

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