Unit 2 Periodic Table

The Modern Periodic Table of Elements is arranged by

• atomic mass

• atomic number

• valence electrons

• number of isotopes

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

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

answer choices

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Which is an alkali metal?

• Magnesium

• Iron

• Sodium

• Europium

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Neptune

Elements in a .................. have similar chemical properties.

• period

• group

• row

Which of the following are physical properties of metal?

• Luster

• Conductivity

• Malleability

• Ductility

True or False: The reactivity of metals tends to decrease as you move from left to right across the periodic table.

• True

• False

Name this group: These metals are the most reactive.

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Name this group: These metals are the second most reactive.

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