Electron Configurations and Periodic Trends

From the following elements, which has the highest electronegativity?

• Na
• Mg
• Si
• Cl

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Which of these sequences do not show the correct trend in ionization energy?

• Al<Si< P<Cl
• Be<Mg<Ca<Sr
• I<Br<Cl<F
• Na<Mg<Al<Si

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What is the electron configuration for Arsenic?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p³
• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶
• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³
• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p³

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NGSS.HS-PS1-1

Which element has a noble gas configuration of [Ne] 3s² 3p³?

• Magnesium
• Phosphorus
• Aluminum
• Sulfur

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NGSS.HS-PS1-1

Which element has the following electron configuration: [Ar] 4s² 3d¹⁰ 4p⁴?

• Bromine
• Gold
• Iodine
• Selenium

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Which element requires the LEAST amount of energy to remove the most loosely held electron from a gaseous atom in the ground state?

• Gold
• Bromine
• Lithium
• Beryllium

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What is the trend of atomic radius? 

• Atomic radius decreases from Titanium to Zinc
• Atomic Radius increases from Barium to Beryllium
• Atomic radius decreases from Nickel to Gold
• Atomic Radius increases from Chromium to Fluorine

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Which statement describes the general trends in electronegativity and metallic properties across Period 3 moving from left to right? 

• Electronegativity increases and metallic properties decrease.
• Electronegativity decreases and metallic properties increase.
• Both electronegativity and metallic properties increase.
• Both electronegativity and metallic properties decrease.

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What is the chemical family for Fluorine (F)?

• Alkali Metals

• Alkaline Earth Metals

• Transition Metals

• Halogens

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What is the chemical family for Potassium (K)?

• Noble gases

• Halogens

• Transition Metals

• Alkali Metals