Lesson 1.3 Flashcards

1
Q

a kind of matter with a definite or fixed composition

A

pure substance

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2
Q

Pure substances are classified into elements and compounds

A
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3
Q

is made up of

one kind of atom, or two or more of the same kind of atoms that are chemically combined.

A

element i

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4
Q

is made up of different kinds of atoms that are combined
through a chemical reaction

have different properties from the elements that
make them up

A

a compound

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5
Q

are the simplest substances because they are made up of only one kind of atom.
It is a pure substance that is composed of only one type of atom.

A
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6
Q

are the simplest substances because they are made up of only one kind of atom.
It is a pure substance that is composed of only one type of atom.

t cannot be decomposed into simpler substances by physical or chemical means.
Thus, it is not possible to alter the identity through ordinary chemical
reactions.

Physical changes such as melting, freezing, or cutting do not change the identity of pure
substances.

simplest forms of substance, they are also considered as the
building blocks of matter

A

elements

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7
Q

start at the left and make up most of the elements in the periodic table. In fact, all
elements to the left of the staircase-like line in the periodic table (except hydrogen) are
generally classified as

A

metals

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8
Q

are at the right part of the periodic table and are

often shaded with different colors to distinguish them from metals

A

nonmetals

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9
Q

between the metals and nonmetals. These elements form the staircase-like line in the
periodic table

A

metalloid

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10
Q

Metals have properties that distinguish them from nonmetals. For instance, metals (except
mercury) are solid at room temperature. Metals have luster or the property that makes
them shiny.

Most metals exhibit malleability or a property that enables metals to be
hammered into thin sheets without breaking.

Metals also possess ductility or the ability to
be drawn into wires.

This is the
reason why metals are good raw materials for making cooking pans, pots, and electrical
wirings

A
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11
Q

on the other hand, are the opposite of metals. Generally, nonmetals are either
gaseous or dull solids. These elements are brittle as they break apart easily when subjected
to a heavy blow. Nonmetals are poor conductors of heat and electricit

A
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11
Q

on the other hand, are the opposite of metals. Generally, nonmetals are either
gaseous or dull solids. These elements are brittle as they break apart easily when subjected
to a heavy blow. Nonmetals are poor conductors of heat and electricit

A

Nonmetals

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12
Q

nonmetals major elements

in living things

A

carbon, hydrogen, oxygen, nitrogen, and sulfur

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13
Q

are elements that exhibit properties of both metals and
nonmetals.

some are shiny like metal but are also brittle like a nonmetal

can conduct heat and electricity but not as good as how metals act as
conductors

A

metalloids/semimetals

semiconductors

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14
Q

are pure substances that are
composed of two or more different elements that
are combined in a fixed ratio by a chemical reaction

A

Compounds

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15
Q

substances that contain the elements carbon and hydrogen

A

Organic

compounds

16
Q

Most organic
compounds are present in the food that the body needs in order to thrive. These organic
compounds are

A

carbohydrates, proteins, lipids, and nucleic acids.

17
Q

are substances that do not have carbon-hydrogen bonds

A

Inorganic compounds

18
Q

Carbon dioxide, water, and table

salt are all examples of inorganic compounds.

A
19
Q

consist of two or more substances that are combined physically. When two or
more substances are put together, they form a mixture if there is no chemical reaction that
took place between them

A

Mixtures

20
Q

consists of particles that are evenly spread out or distributed

also known as
solutions

A

homogeneous mixture

21
Q

composed of a solute and a solvent

A

solution

22
Q

the substance that is dissolved by another substance

A

solute

23
Q

the dissolving medium in which the solute

dissolves

A

solvent

24
Q

Substances that dissolve in a given solvent

A
25
Q

Substances that dissolve in a given solvent

A

soluble

26
Q

Liquids that are soluble in each other at all proportions are

A

miscible

27
Q

Solutions in

which the solvent is water is known as

A

aqueous solutions

28
Q

solid solutions or mixtures of metals with other metals

or nonmetal

A

alloys

29
Q

consists of particles that are not evenly distributed throughout

A

heterogeneous mixture

30
Q

are heterogeneous mixtures with particles that are bigger than those of a solution
but smaller than those of a suspension

A

Colloids

31
Q

a phenomenon wherein light is scattered.

A

Tyndall effect,

32
Q

Some examples of colloids are

mayonnaise, hair gel, and blood.

A
33
Q

are heterogeneous mixtures with suspended particles that are large enough
to be seen by the naked eye

A

Suspensions