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Questions and Answers
What type of ions do alkali metals form when they react?
What type of ions do alkali metals form when they react?
What happens to the reactivity of halogens as you go down the group?
What happens to the reactivity of halogens as you go down the group?
Which of the following statements correctly describes transition metals?
Which of the following statements correctly describes transition metals?
Why do alkali metals need to be stored in oil?
Why do alkali metals need to be stored in oil?
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What is a characteristic trend in the physical properties of halogens?
What is a characteristic trend in the physical properties of halogens?
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Study Notes
Alkali Metals
- Alkali metals react with oxygen to form metal oxides.
- Alkali metals are easily oxidized and are stored in oil to prevent this reaction.
- Alkali metals react with water to form alkali hydroxide and hydrogen gas.
- Alkali metals only form +1 ions.
Halogens
- Halogens are non-metals with 7 electrons in their outer shell.
- They form -1 ions.
- They exist as diatomic molecules.
- Halogens have low melting and boiling points that increase as you move down the group.
- Their reactivity decreases as you move down the group.
- A halogen can displace a less reactive halogen from a compound in a displacement reaction.
- Fluorine is the most reactive halogen, and Astatine is the least reactive.
Reactivity Trends
- Reactivity increases down Group 1 because the outer shell electrons are further from the nucleus, leading to weaker attraction and easier loss of an electron.
- Reactivity decreases down Group 7 because the outer shell electrons are further from the nucleus, leading to weaker attraction for an incoming electron.
Transition Metals
- Transition metals are found between Group 2 and 3 on the periodic table.
- They are lustrous (shiny), hard, strong, have high density, are ductile (can be drawn into wires), malleable (can bend into shape), and good conductors of heat and electricity.
- Transition metals have high melting and boiling points.
- Most transition metals are not magnetic.
- Transition metals are not very reactive.
- They form colorful compounds and can form ions with various charges.
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Description
Test your knowledge on the properties and reactivity of alkali metals and halogens. This quiz covers their reactions, oxidation states, and trends in reactivity. Perfect for high school chemistry students!
