Separate Chemistry 1

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21 Terms

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Protons

Positively charged subatomic particles found in the nucleus, determining the element's identity (atomic number).

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Neutrons

Neutral subatomic particles found in the nucleus, contributing to the mass number and stabilizing the nucleus.

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Electrons

Negatively charged subatomic particles orbiting the nucleus in electron shells, involved in chemical bonding and reactions.

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Atomic Number (Z)

The number of protons in an atom, unique to each element.

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Mass Number (A)

The sum of protons and neutrons in an atom's nucleus.

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Isotopes

Variants of an element with the same number of protons but different numbers of neutrons.

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Groups

Vertical columns in the periodic table where elements share similar chemical properties due to the same number of valence electrons.

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Periods

Horizontal rows in the periodic table where elements have increasing atomic numbers from left to right.

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Atomic Radius

Increases down a group and decreases across a period due to electron shell variations and nuclear charge.

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Ionization Energy

Decreases down a group and increases across a period, affecting the ease of removing electrons.

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Electronegativity

Decreases down a group and increases across a period, influencing the attraction for bonding electrons.

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Ionic Bonding

Transfer of electrons between metals and nonmetals to form ions, like NaCl (sodium chloride).

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Covalent Bonding

Sharing of electrons between nonmetals, as seen in water (H2O).

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Metallic Bonding

Delocalized electrons shared among metal cations, exemplified by copper (Cu).

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States of Matter

Solid, Liquid, Gas - differing in shape, volume, and particle arrangement.

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Changes of State

Melting, Freezing, Boiling, Condensation, Sublimation - transitions between states of matter.

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Intermolecular Forces

Weaker than bonding forces, influencing properties like melting and boiling points.

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Moles

Unit for amount of substance, calculated using n = m/M where n is moles, m is mass, and M is molar mass.

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Avogadro's Constant

Value of 6.022Ă—10^23 representing the number of particles in one mole.

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Balanced Equations

Show conservation of mass and moles in chemical reactions.

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Concentration

Calculated as c = n/V where c is concentration, n is moles, and V is volume.