Periodic Table Trends

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What is a nonmetal?

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A nonmetal is an element that typically lacks the characteristics of metals, such as luster and conductivity. Nonmetals are usually poor conductors of heat and electricity and can be gases, liquids, or solids at room temperature.

Front

What are the elements in a group on the periodic table?

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Elements in a group (or family) have similar chemical properties and the same number of valence electrons.

Front

Which two families on the periodic table are the most reactive?

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The two most reactive families on the periodic table are the Alkali metals and the Halogens.

Front

What is an alkali metal?

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Alkali metals are the elements found in Group 1 of the periodic table, characterized by having one valence electron. They are highly reactive, especially with water.

Front

What do elements in the same group have in common?

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Elements in the same group have the same number of valence electrons, which leads to similar chemical properties.

Front

What is the periodic table?

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The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.

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What is a metalloid?

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Metalloids are elements that have properties intermediate between metals and nonmetals. They can conduct electricity better than nonmetals but not as well as metals.

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What are valence electrons?

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Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

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What is the significance of the periodic trends?

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Periodic trends, such as electronegativity, atomic radius, and ionization energy, help predict the behavior of elements in chemical reactions.

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What is ionization energy?

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Ionization energy is the energy required to remove an electron from an atom in its gaseous state.