Chemistry Semester 1 Exam review

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What is the classification of matter?

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Matter can be classified into two main categories: pure substances (elements and compounds) and mixtures (homogeneous and heterogeneous).

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What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas, each with distinct properties.

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

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What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in fixed proportions.

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What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

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What is atomic number?

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The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

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What is a noble gas?

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Noble gases are a group of elements in Group 18 of the periodic table that are characterized by their lack of reactivity due to having a full valence shell.

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product.

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What is a single replacement reaction?

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A single replacement reaction is a chemical reaction where one element replaces another in a compound.

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What is a double replacement reaction?

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A double replacement reaction is a chemical reaction where two compounds exchange ions or bonds to form two new compounds.