Understanding Chemical Patterns

What are elements and compounds made up of?

• Molecules

• Atoms

• Cells

• Ions

Why is it important to look inside the atoms of chemical elements?

• To understand the way chemicals react with each other.

• To determine the color of the elements.

• To measure the weight of the elements.

• To find the temperature at which elements melt.

What can you find when you understand the patterns of elements and compounds?

• The speed at which they dissolve in water.

• Patterns that explain their properties and reactions.

• The exact age of the elements.

• The taste of the compounds.

Who was the scientist responsible for forming the basis of the periodic table?

• Albert Einstein

• Dmitri Mendeleev

• Isaac Newton

• Marie Curie

How are elements arranged in the periodic table?

• By alphabetical order

• By date of discovery

• In order of atomic mass

• By color

What did Mendeleev predict about the elements that had not yet been discovered?

• Their color

• Their atomic number

• Their properties

• Their melting point

What are the rows in the periodic table called?

• Groups

• Families

• Periods

• Levels

What do columns in the periodic table represent?

• Elements with similar properties

• Elements with the same atomic mass

• Elements discovered in the same year

• Elements with the same color

What is the periodic table?

• A chart showing all known elements arranged by atomic number

• A list of chemical reactions

• A table of mathematical formulas

• A chart of historical events

Why is the arrangement of elements called the periodic table?

• Because it is updated periodically

• Because elements with similar properties occur at regular intervals

• Because it is a periodic publication

• Because it is arranged alphabetically