Science

The scientific study of the structure of substances, how they react when combined or in contact with one another, and how they behave under different conditions

• chemistry

• physics

• biology

• anatomy

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The scientific study of matter and energy and the relationships between them, including the study of forces, heat, light, sound, electricity and the structure of atoms

• chemistry

• physics

• biology

• anatomy

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The electrons surrounding an atom are located in regions around the nucleus called “________ ___________”. It represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be.

• electron

• energy level

• atomic theory

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Is a basic substance. It cannot be broken down into simpler substances.

• electronic configuration

• periodic table

• chemical element

A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

• chemical element

• periodic table

• electronic configuration

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The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

• Atomic number

• Atomic weight

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Also called relative atomic mass, ratio of the average mass of a chemical element's atoms to some standard.

• Atomic number

• Atomic weight

Any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.

• alkali metals

• alkali earth metals

• lanthanides

• actinides

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Any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence.

• alkali metals

• alkali earth metals

• lanthanides

• actinides

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Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.

• alkali metals

• alkali earth metals

• lanthanides

• actinides

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