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Lithium is a metal and hydrogen is a nonmetal. explain why both are placed in group 1.

User Danny
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Final answer:

The alkali metals, including lithium, sodium, potassium, rubidium, cesium, and francium, are placed in Group 1 because they all have similar properties. Hydrogen is also placed in Group 1 because it shares some similar properties with the alkali metals.

Step-by-step explanation:

The alkali metals, including lithium, sodium, potassium, rubidium, cesium, and francium, are placed in Group 1 of the periodic table because they all have similar properties. They are soft, shiny, and highly reactive metals. While hydrogen is not a metal, it is placed in Group 1 because it shares some similar properties, such as having one electron in its outer shell, like the alkali metals.

User Davsket
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