Chapter 5 Modern Chemistry

How did Mendeleev arrange the elements?

• alphabetically by element name

• density

• atomic number

• atomic mass

Which group of the periodic table is composed of inert (unreactive) gases?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Elements which are shiny, conduct electricity and heat are called:

• metal

• nonmetal

• metalloid

• radioactive

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What are the elements along the dark line on the periodic table called?

• metals

• nonmetals

• metalloids

• noble gases

What is on the left side of the dark line on the periodic table?

• Non-Metals

• Metals

• Metalloids

• Anions

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Niobium

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Which is an alkali metal?

• Magnesium

• Iron

• Sodium

• Europium

In the modern periodic table elements are arranged by:

• valence electrons

• atomic number

• alphabetical order

• atomic mass

How many valance electrons does iodine have?

• 6

• 16

• 7

• 17

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The majority of elements on the periodic table are:

• radioactive.

• nonmetals.

• metals.

• gases.