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Chemistry > Topic 1: Stoichiometric relationships1.1 Introduction to the particulate nature of matter and chemical change > Flashcards

Topic 1: Stoichiometric relationships1.1 Introduction to the particulate nature of matter and chemical change Flashcards

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1
Q

are the simplest unit of an element that can exist on its own.

A

Atom

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2
Q

are substances that contain two or more elements

A

Compounds

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3
Q

a property of a substance that can be measured without it changing into another substance. Melting points, boiling points, appearance, and density are examples of physical properties

A

physical properties

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4
Q

a property of a substance that becomes evident when it reacts and changes into another substance. Acidity, reactivity with water and enthalpies of reactions are examples of chemical properties

A

chemical properties

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5
Q

a substance that cannot be broken down into a simpler substance by chemical means

A

element

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6
Q

a one-or two-letter representation of an element’s name

A

chemical symbol

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7
Q

a table that organizes the elements by increasing atomic number and the number of valence electrons

A

Periodic Table

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8
Q

defined as the number of protons in the nucleus. It has the symbol Z

A

atomic number

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9
Q

the electrons that are in the outermost level of an atom

A

valence electrons

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10
Q

a shorthand representation of a compound. It uses element symbols and subscripts to show how many atoms of each element are in the compound

A

Chemical Formula

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11
Q

uses chemical formulas to show what happens in a chemical reaction.

A

chemical equation

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12
Q

a process in which one set of substances is turned into another set of substances.

A

chemical reaction

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13
Q

the substances that are turned into other substances in a chemical reaction. Reactants appear on the left of the arrow in a chemical equation.

A

reactants

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14
Q

the substances that are made from other substances in a chemical reaction. Products appear on the right of the arrow in a chemical equation.

A

products

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15
Q

a chemical equation in which the same number of atoms of each element are present on the reactant and product sides of the equation.

A

balanced equation

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16
Q

the numbers that are written in front of the chemical formulas in a balanced equation.

A

stoichiometric coefficients

17
Q

the different ways that substances can exist. Solids, liquids, and gases are the three states of matter that are most common

A

states of matter

18
Q

a state of matter in which the substance particles are held in fixed positions. A solid has a fixed shape and fixed volume.

A

solid

19
Q

a state of matter in which the substance particles are able to move. A liquid does not have a fixed shape but it does have a fixed volume.

A

liquid

20
Q

a state of matter in which the substance particles are able to move independently and are spread out. A gas does not have a fixed shape or fixed volume.

A

gas

21
Q

a solution that is formed by dissolving a substance in water

A

aqueous solution

22
Q

the change of state that occurs when a solid changes directly into a gas

A

sublimation

23
Q

the change of state that occurs when a gas changes into a liquid

A

condensing

24
Q

the change of state that occurs when a liquid changes into a gas. There are two types of vaporization: boiling and evaporation

A

vaporization

25
Q

the change of state that occurs when a liquid changes into a gas at a temperature below the boiling point. Evaporation occurs at the surface of the liquid

A

evaporation

26
Q

the change of state that occurs when a liquid changes into a gas when it has been heated to the boiling point. Boiling occurs throughout the liquid

A

boiling

27
Q

a combination of two or more substances that are not chemically bonded to each other

A

mixture

28
Q

a mixture in which all of the substances are present in the same state and are spread equally through the mixture

A

homogeneous mixture

29
Q

a mixture in which the substances are present in different states and are not spread equally through themixture

A

heterogeneous mixture

Chemistry (1 decks)

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