Periodic Table v2

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What are alkali metals?

Back

Alkali metals are a group of elements in Group 1 of the periodic table, known for having one electron in their outermost shell. They are highly reactive and include elements like lithium (Li), sodium (Na), and potassium (K).

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity and its position on the periodic table.

Front

What are halogens?

Back

Halogens are a group of elements in Group 17 of the periodic table, known for being highly reactive nonmetals. They include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Front

What are noble gases?

Back

Noble gases are a group of elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full outer electron shell. They include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

Front

What is the significance of the periodic table?

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The periodic table organizes all known chemical elements based on their atomic number, electron configuration, and recurring chemical properties, allowing for the prediction of element behavior.

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What is an isotope?

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An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons, resulting in a different atomic mass.

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What is the difference between metals and nonmetals?

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Metals are typically shiny, good conductors of heat and electricity, and malleable, while nonmetals are usually dull, poor conductors, and brittle.

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What is a chemical property?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction, such as reactivity with acids or bases.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity, such as color, melting point, and density.

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What is the role of electrons in chemical bonding?

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Electrons, particularly those in the outermost shell, play a crucial role in chemical bonding by being shared or transferred between atoms to form molecules.