C2 Flashcards

1
Q

what is the Periodic Table

A

A table of all the known elements arranged in order of atomic number so
that elements with similar properties are in columns, known as groups

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2
Q

who is Mendeleev

A

The scientist who developed the periodic table. He left gaps for elements he
predicted had not yet been discovered

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3
Q

what are groups

A

A column of the periodic table that contains elements with similar chemical
properties

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4
Q

what are Alkali Metals

A

A metal in Group 1 of the periodic table

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5
Q

what are Transition elements

A

Most metals. are transition metals . They include iron, copper and
chromium. The transition elements are in the central part of the periodic
table

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6
Q

what are Metals

A

An element that forms positive ions

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7
Q

what are Halogens

A

An element in Group 7 of the periodic table

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8
Q

what are Noble gases

A

An unreactive gas found in Group 0 of the periodic table

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9
Q

what’s an Inert

A

A substance that does not take part in chemical reactions

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10
Q

what are Non-metals

A

An element that forms negative ions

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11
Q

what are Physical properties

A

Physical properties can be observed or measured without changing the
composition of matter. Physical properties are used to observe and describe
matter. Physical properties include: appearance, texture, color, odor,
melting point, boiling point, density, solubility, polarity, and many others

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12
Q

what is Melting point

A

The temperature at which a substance changes from solid to liquid (melts). It
is also the temperature at which a substance changes from liquid to solid
(freezes)

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13
Q

what is Melting

A

A change of state from solid to liquid

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14
Q

what is Boiling point

A

The temperature at which a substance changes from liquid to gas
(evaporates). It is also the temperature at which a substance changes from
gas to liquid (condenses)

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15
Q

what is Boiling

A

The process that happens at the boiling point of a substance when the rate of
evaporation is at its maximum

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16
Q

what are Chemical properties

A

A chemical property is a characteristic of a particular substance that can be
observed in a chemical reaction. Some major chemical properties include
flammability, toxicity, heat of combustion, pH value, rate of radioactive
decay, and chemical stability

17
Q

what is Reactivity

A

A measure of how reactive a substance is

18
Q

what is Unreactive

A

A substance which does not react chemically

19
Q

what are Displacement

reactions

A

A reaction in which a more reactive substance displaces a less reactive
substance