Question

1. members of this family are shiny and reactive. they have rather large nuclei. they are used in color displays and other electronic devices. (0.5 points) * alkali metals transition metals actinides boron group alkaline earth metals oxygen group carbon group noble gases halogens nitrogen group lanthanides

Explanation:

• Alkali metals: Reactivity is high, but not typically used in color displays.
• Transition metals: While some are shiny, not the best fit for the description.
• Actinides: Radioactive, not relevant for common color displays.
• Boron group: Properties don't match well.
• Alkaline earth metals: Reactivity and use don't align.
• Oxygen group: Non - metals, not shiny in the metallic sense.
• Carbon group: Varies, but not the right fit.
• Noble gases: Inert, not reactive.
• Halogens: Non - metals, not shiny metals.
• Nitrogen group: Non - metals or semi - metals.
• Lanthanides: Shiny, reactive (though less than alkali metals in some ways), have relatively large nuclei (due to lanthanide contraction effects in a way related to their electron configurations and nuclear charge), and are used in color displays (e.g., in phosphors for CRTs which were used in some color displays) and other electronic devices (e.g., in some magnets and electronic components).

Answer:

Lanthanides