Chemical Equations Definitions Flashcards

Questions and Answers

What do symbols represent in chemistry?

One or two letters used to represent an element.

What is a chemical formula?

A combination of symbols and numbers that represent the number and types of elements (atoms) present in a compound.

What does a subscript indicate in a chemical formula?

A small number to the right of a symbol that shows how many atoms of an element are present.

What is a chemical reaction?

When substances interact to form one or more new substances with different properties than the original substances. Signup and view all the answers

What is a chemical equation?

A combination of symbols and chemical formulas used to describe what happens in a chemical reaction. Signup and view all the answers

What is the purpose of a coefficient in a chemical formula?

A number written in front of a chemical formula to show how many molecules of that substance are present. Signup and view all the answers

What are reactants in a chemical reaction?

Formulas written on the left side of the arrow symbol (->) which are the starting substances. Signup and view all the answers

What are products in a chemical reaction?

Formulas written on the right side of the arrow symbol (->) that are the new substances formed. Signup and view all the answers

What does 'yields' signify in a chemical equation?

An arrow symbol indicating that a reaction has taken place. Signup and view all the answers

What is a compound in chemistry?

A substance composed of two or more elements chemically combined in a definite proportion. Signup and view all the answers

What is a physical change?

A change in which the characteristics of a substance are only changed physically. Signup and view all the answers

Study Notes

Chemical Equations and Definitions

Symbols are one or two letters used to denote elements in chemical notation.
A chemical formula represents a compound through a combination of symbols and numbers that indicate the types and quantities of elements (atoms) present.
Subscripts are small numbers written to the right of a chemical symbol, indicating the number of atoms of an element in a substance; absence of a subscript signifies one atom.
A chemical reaction occurs when substances interact, resulting in the formation of one or more new substances with distinct properties from the original substances.
A chemical equation describes the process of a chemical reaction using symbols and formulas, outlining the reactants and the resulting products.
Coefficients are numbers placed in front of chemical formulas in an equation to show how many molecules of that substance are involved in the reaction.
Reactants are the starting substances in a chemical reaction, represented on the left side of the arrow in a chemical equation.
Products are the new substances created during a chemical reaction, indicated on the right side of the arrow in a chemical equation.
The term "yields" is represented by an arrow (->) symbol in chemical equations, indicating the transformation of reactants into products.
A compound is a substance formed from two or more elements that are chemically combined in a fixed proportion.
Physical change refers to alterations in the physical properties of a substance, without changing its chemical composition.

Description

Test your understanding of key terms related to chemical equations with these flashcards. Learn about symbols, chemical formulas, and subscripts to enhance your chemistry knowledge. Perfect for students at all levels looking to solidify their understanding of chemical representation.