Electron Structure and The Periodic Table

What element has the neutral, ground state electron configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d⁶?

• Sg

• Rf

• Hs

• Cn

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Which of the following phenomena is most responsible for the trend in ionization energy of elements going across a period?

• more valence electrons

• increased number of energy levels

• increase in shielding

• effective nuclear charge

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Select all of the groups from the Periodic Table which are considered part of the "representative elements".

• Alkali metals

• Transition metals

• Noble gases

• Halogens

Which group in the Periodic Table is known as the alkali metals?

• Group 1

• Group 2

• Group 17

• Group 18

How many valence electrons do all of the elements in group 14 have?

• 4

• 2

• 6

• 8

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Which group in the Periodic Table is known for having elements with a full valence shell?

• Group 18

• Group 17

• Group 16

• Group 15

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Who is credited with creating the first accepted periodic table of elements?

• A) Dmitri Mendeleev

• B) Albert Einstein

• C) Marie Curie

• D) Isaac Newton

Which of the following best describes the trend for electron affinity?

• Increases across a period and decreases down a group

• Decreases across a period and increases down a group

• Remains constant across a period and increases down a group

• Increases across a period and remains constant down a group

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Select the element with the largest atomic radius.

• Beryllium

• Radium

• Strontium

• Calcium

Select the element with the smallest atomic radius.

• magnesium

• silicon

• chlorine

• sulfur

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