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Boron - Solid, black, 2.37 g/cm³, 27 watts
Aluminum - Solid, silver, 2.7 g/cm³, 235 watts
Gallium - Solid, blue-grey or silver, 5.9 g/cm³, 29 watts
Indium - Solid, silvery-white, 7.31g/cm³, 82 watts
Thallium - Solid, silvery, 11.85 g/cm³, 46 watts
Nihonium - Synthetic element

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lerner.org

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Only one element in this family is a metalloid the rest are classified as metals. Aluminum is the third most commonly found element in the earth's crust.

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Boron - Boron is important for the human body to maintain a good balance of sex hormones
Aluminum - Aluminum is used by many industries because of its resistance to corrosion
Gallium - Gallium is used to make red LEDs because of its ability to convert electricity to light
Indium - Indium can be used to make mirrors that are as reflective as silver mirrors but do not tarnish as quickly
Thallium - Thallium has been used as a rat and mouse poison, and a form of thallium is used to study the flow of blood
Nihonium - Nihonium is only used for basic scientific research so far

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The melting points of the elements decrease as you move down the family

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Boron - B
Aluminum - Al
Gallium - Ga
Indium - In
Thallium - Tl
Nihonium - Nh

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Boron - Melting point of 3769 F, boiling point of 7101 F
Aluminum - Covered with a thin layer of oxide, therefore it won't react with air
Gallium - Combines with most non-metals at high temperatures, and reacts with acids and alkalis
Indium - Low melting point, above its melting point it ignites violently
Thallium - Very soft metal that can be cut with a knife
Nihonium - Unkown

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boron-[He] 2s2  2p1
Aluminum-[Ne] 3s² 3p1
Gallium-[Ar] 3d¹⁰ 4s2   4p1
Indium- [kr] 4d10  5s² 5p1
thallium-[Xe] 4f¹⁴ 5d¹⁰
Nihonium-[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹

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Sofia Ceja
Jose Morales