2 Flashcards
can be classified based on its composition.
They can be classified as pure substances or mixtures.
Matter
Elements and
compounds both have
___________
and exhibit specific
properties.
definite composition
can be
classified as metals,
nonmetals, and
metalloids.
Elements
General properties:
o lustrous solid at room
temperature (except Hg,
which is liquid)
o hardness and tensile strength
o ductility and malleability
o good heat/electricity
conductors
o high melting point/boiling
Metals
General properties:
o either solid or gas at room
temperature (except Br2, which
is liquid)
o brittle and dull solids
o poor conductors of heat and
electricity
o low melting and boiling points
Nonmetals
o exhibit properties of both
metals and nonmetal
o conducts heat and
electricity but not as good
as how metals act as
conductors
o semiconductors
Metalloids/Semimetals
may be categorized based on the presence of the
element carbon: organic or inorganic
Compounds
a class of compounds in which one or more carbon
atoms are bonded to other elements, most
commonly hydrogen, oxygen, or nitrogen
Organic Compounds
a class of compounds lacking carbon-hydrogen
bonds
Inorganic Compounds
o everything else except carbon
o comprise most of Earth’s crust
Inorganic compounds
are those
that contain carbon atoms
bonded to elements like H, O,
and N.
Organic compounds
are those without the element
carbon.
Inorganic compounds
are those without the element
carbon.
Inorganic compounds
electron transfer
o made up of positively
charged species (cations)
bonded to negatively
charged species (anions)
Ionic compounds
are forms of matter that have a
definite or fixed composition. They can be classified
as elements or compounds.
Pure substances
the simplest form of matter that is
made up of a single atom or more of the same kind of
atoms that are chemically bound.
element
the simplest form of matter that is
made up of a single atom or more of the same kind of
atoms that are chemically bound.
element
the simplest form of matter that is
made up of a single atom or more of the same kind of
atoms that are chemically bound.
element
may be classified as metals, nonmetals,
and metalloids.
Elements
is made up of different kinds of atoms
that are combined by a chemical reaction.
compound
may be classified based on the presence
of a particular element.
Compounds
are a class of compounds in
which one or more carbon atoms are bonded to other
elements like hydrogen, oxygen, or nitrogen.
Organic compounds
are a class of compounds that
do not have carbon-hydrogen bonds.
Inorganic compounds
Compounds may be classified based on the type of
bonding between elements.
o ionic compounds
o covalent compounds
Compounds may be classified based on the type of
bonding between elements.
o ionic compounds
o covalent compounds
can be represented by a chemical
formula or a combination of chemical symbols of
elements that constitute the compound.
compound
To make elements easier to describe in written form,
_______ are used
chemical symbols
Pure substances have fixed or definite composition.
True
The chemical symbol of an element always starts with a small letter.
False
Components of compounds can be separated through physical
means.
False
Atoms that composed a compound are tightly held by chemical
bonds.
True
The subscript added after the chemical symbol of an element
indicates its number of atoms.
True
It is the simplest form of pure substances.
Element
This substance cannot be separated into simpler forms through
ordinary chemical means.
Element
This substance can be categorized as organic or inorganic.
Compound
The three main groups of this substance are metals, nonmetals, and
metalloids
Element
This substance can be broken down into simpler components.
Compound
Anything that occupies space and has mass
Matter
According to the change involve during the measurement of the property
Properties of matter
According to the change involve during the measurement of the property
Properties of matter
Readily observable and measurable without changing the matter composition
Physical properties
Can only be seen when the chemical identify of material
Chemical properties
Do not depend on the amount of matter
Intensive properties
Depends on the amount of matter
Extensive properties
