Physical Science Final Review

The smallest unit of matter.

• element

• atom

• nucleus

Positively charged subatomic particles

• protons

• electrons

• neutrons

• nucleus

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A subatomic particle with a neutral or no charge

• protons

• neutrons

• electrons

The number on the periodic table for each element that shows how many protons and electrons it contains.

• mass number

• atomic number

• valence electrons

The number of outermost electrons in the atomic structure.

• protons

• neutrons

• valence electrons

• atomic number

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An organized diagram of all the elements.

• periodic table

• isotope notation

• lewis dot diagram

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A negatively charged subatomic particle.

• protons

• neutrons

• electrons

Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons and therefore different mass numbers.

• mass number

• isotope

• valence electron

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Group 2 of the periodic table contains 2 valence electrons and are also very reactive especially with the carbon family.

• alkaline earth metals

• transition metals

• alkali metals

• halogens

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Group 7 of the periodic table, that starts with Fluorine, is not as reactive as the lower numbered groups but still commonly reacts with group 1.

• noble gases

• halogens

• alkali metals

• transition metals

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