Periodic Table Development & Families

What caused the rate of discovery to increase after 1700?

• chemists discovered the atom
• chemists began to use the scientific method to search for elements
• chemists began guessing and discovering elements by random luck
• the rate didn't increase

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What did chemists use to sort elements into groups?

• chemical and physical properties
• chemical and physical changes
• cryptic and physiological properties
• chemical and physical state of matter

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Who is the "Father of the Periodic Table"

• Joseph Mosely
• Dimitri Mendeleev
• Michael Jackson
• Albert Einstein

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What property did Mendeleev use to organize the elements into a periodic table?

• atomic mass
• atomic number
• protons
• neutrons

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What made Mendeleev's periodic table so unique?

• he discovered all the elements
• he organized his table by atomic mass
• he left blanks for undiscovered elements
• he separated metals and nonmetals

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True or False? Mendeleev used his periodic table to predict the properties of undiscovered elements.

• True
• False

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How are elements arranged in the modern periodic table?

• atomic mass
• atomic number
• protons
• neutrons

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True or False? The periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of physical and chemical properties

• True
• False

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Which is the largest category in the periodic table?

• metals
• nonmetals
• metalloids

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Which property below is NOT a general property of metals?

• ductile
• poor conductor of heat
• malleable
• high luster

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