Review Valence Electrons

What are valence electrons?

• Electrons in the nucleus of an atom

• Electrons in the outermost shell of an atom involved in chemical bonding

• Electrons in the middle shell of an atom

• Electrons in the innermost shell of an atom

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How many valence electrons does an atom of oxygen have?

• 6

• 8

• 2

• 4

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What is the significance of valence electrons in determining the reactivity of an element?

• Valence electrons determine the chemical properties and reactivity of an element.

• Valence electrons are only important for the melting point of an element

• Valence electrons only determine the color of an element

• Valence electrons have no impact on the reactivity of an element

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What is the trend of valence electrons across periods in the periodic table?

• Increases by one

• Remains constant

• Varies randomly

• Decreases by one

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Explain the relationship between the group number and the number of valence electrons in the periodic table.

• The group number indicates the number of valence electrons.

• The group number indicates the number of protons

• The group number indicates the number of neutrons

• The group number indicates the number of electrons in the innermost shell

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How do the number of valence electrons affect the chemical properties of an element?

• It affects the chemical properties by determining the reactivity and bonding behavior of the element.

• It has no effect on the chemical properties

• It causes the element to change color

• It makes the element less reactive

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What is the significance of the periodic table in understanding the behavior of elements?

• The periodic table is only useful for organizing elements based on their color

• The periodic table organizes elements based on their atomic number and electron configuration, which helps in understanding their behavior and properties.

• The periodic table is only relevant for understanding the behavior of compounds, not elements

• The periodic table has no significance in understanding the behavior of elements

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Explain the arrangement of elements in the periodic table based on their valence electrons.

• Valence electrons have no effect on the arrangement of elements in the periodic table

• The periodic table is arranged based on the number of protons in the nucleus

• The arrangement of elements in the periodic table is random and not based on any specific property

• Valence electrons determine the chemical properties of an element and are responsible for the element's placement in the periodic table.

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How many valence electrons does a neutral atom of sodium have?

• 2

• 1

• 3

• 4

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What is the maximum number of electrons that can occupy the first energy level?

• 4

• 2

• 6

• 8