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Questions and Answers
What happens to the reactivity of alkali metals as you move down the group?
What happens to the reactivity of alkali metals as you move down the group?
- Reactivity remains constant
- Reactivity increases because the outer electron is further from the nucleus (correct)
- Reactivity decreases due to increased nuclear charge
- Reactivity fluctuates between increasing and decreasing
Why are alkali metals stored in oil?
Why are alkali metals stored in oil?
- To preserve their low melting and boiling points
- To prevent them from oxidizing when exposed to air
- To enhance their lustrous appearance
- To stop them from reacting with water and oxygen vapor in the air (correct)
What is produced when alkali metals react with water?
What is produced when alkali metals react with water?
- Hydrogen gas and a metal hydroxide (correct)
- Oxygen gas and metal oxide
- Carbon dioxide and a metal sulfate
- Steam and a metal chloride
Which alkali metal is hardest to cut?
Which alkali metal is hardest to cut?
Why are alkali metals categorized as 'alkali'?
Why are alkali metals categorized as 'alkali'?
What characteristic is NOT true for group 1 metals?
What characteristic is NOT true for group 1 metals?
What does the reactivity of alkali metals increase with?
What does the reactivity of alkali metals increase with?
Why is the reactivity of alkali metals described as vigorous when reacting with water?
Why is the reactivity of alkali metals described as vigorous when reacting with water?
What effect does the oxidation have on the surface of alkali metals?
What effect does the oxidation have on the surface of alkali metals?
What is a characteristic feature of the melting and boiling points of alkali metals?
What is a characteristic feature of the melting and boiling points of alkali metals?
Which of the following statements regarding the reactivity of alkali metals is true?
Which of the following statements regarding the reactivity of alkali metals is true?
Why do alkali metals also appear shiny when freshly cut?
Why do alkali metals also appear shiny when freshly cut?
What is primarily produced when alkali metals react vigorously with water?
What is primarily produced when alkali metals react vigorously with water?
What phenomenon leads to the increased reactivity of alkali metals as one moves down the group?
What phenomenon leads to the increased reactivity of alkali metals as one moves down the group?
Flashcards
Reactivity of alkali metals
Reactivity of alkali metals
Alkali metals, like lithium, sodium, and potassium, react more vigorously with water as you move down the group due to increasing atomic size and weaker attraction between the nucleus and outer electron.
Group 1 metal storage
Group 1 metal storage
Group 1 metals (lithium, sodium, potassium) are stored in oil to prevent them from reacting with oxygen and water in the air.
Alkali metal reaction product
Alkali metal reaction product
When alkali metals (like lithium, sodium, or potassium) react with water, hydrogen gas bubbles off, and a metal hydroxide (a strong alkali) is formed.
Alkali metal properties
Alkali metal properties
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Alkali metal name origin
Alkali metal name origin
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Group 1 Reactivity Trend
Group 1 Reactivity Trend
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Alkali Metal Reaction with Water
Alkali Metal Reaction with Water
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Why are Group 1 metals stored in oil?
Why are Group 1 metals stored in oil?
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What makes Group 1 metals 'alkali'?
What makes Group 1 metals 'alkali'?
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What are some properties of Group 1 metals?
What are some properties of Group 1 metals?
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Alkali Metals
Alkali Metals
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Reactivity Trend in Group 1
Reactivity Trend in Group 1
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What is a Metal Hydroxide?
What is a Metal Hydroxide?
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How do Group 1 Metals React with Water?
How do Group 1 Metals React with Water?
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Study Notes
Alkali Metals Summary
- Alkali metals are a group of chemical elements in the periodic table.
- Lithium (Li), Sodium (Na), and Potassium (K) are examples.
- These metals are hard to cut, and are typically silvery-gray, becoming shiny when cut.
- Lithium is the hardest to cut, followed by sodium, and potassium is the easiest to cut.
- The metals are soft.
- The surface of the metal dulls when exposed to air or oxygen.
- Alkali metals are highly reactive elements.
- Reactivity increases as you move down the group.
- The elements in the alkali metal group are similar to each other.
- They all have low melting points and boiling points.
- They all have low densities.
Reaction with Water
- Lithium, sodium, and potassium all react vigorously with water.
- The reaction produces hydrogen gas and a metal hydroxide (which is an alkali).
- Alkali metals are stored in oil to prevent them from reacting with oxygen and water vapor in the air.
- Reactivity increases as you move down the group.
- The added electron shells decrease the force of attraction between the nucleus and the outer electrons, easily lost.
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