7.1 and 7.2 Questions about Mendeleev's Periodic Table

On what basis did Mendeleev originally organize the elements in his periodic table?

• Atomic number

• Electron configuration

• Atomic mass

• Chemical reactivity

In which year was Mendeleev's Periodic Table redrawn as shown in the image?

• 1869

• 1871

• 1900

• 2013

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to Mendeleev's Periodic Table of 1871, which element is in Group II and Period 1?

• Hydrogen (H)

• Beryllium (Be)

• Magnesium (Mg)

• Calcium (Ca)

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Who developed the Modern Day Periodic Table?

• Mendeleev

• Mosley

• Dalton

• Rutherford

How did Mosley organize the elements in the Periodic Table?

• By increasing atomic mass

• By number of neutrons

• By number of protons (Atomic Number)

• By electron configurations

According to the Periodic Law, when do similar properties recur periodically in elements?

• When elements are arranged according to decreasing atomic number

• When elements are arranged in alphabetical order

• When elements are arranged according to increasing atomic number

• When elements are randomly organized

What can the periodic table be used for according to the image?

• To determine the chemical reactions between elements

• To fill in gaps to predict undiscovered elements and their properties

• To find the atomic number of compounds

• To organize elements by their state at room temperature

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NGSS.MS-PS1-1

What do periods in the periodic table correspond to?

• The number of protons in the nucleus

• The number of valence electrons

• The number of energy levels (shells)

• The number of elements in a group

What do groups in the periodic table represent?

• The number of energy levels (shells)

• The number of neutrons in the nucleus

• The number of elements with similar chemical properties

• The number of valence electrons

Why do elements in the same group have similar chemical properties?

• They have the same number of protons.

• They have the same number of energy levels (shells).

• They have the same number of valence electrons.

• They are in the same period.