SAS 03 - CHEMISTRY Flashcards

1
Q

Tabular arrangement of the elements in order of increasing atomic number such that elements having similar chemical properties are positioned in vertical column

A

Periodic Table

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2
Q

states that when elements are arranged in order of increasing atomic number elements with similar chemical properties occur at period interval

A

Periodic law

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3
Q

proposed a system of chemical symbols based on the first letter of their name and based on their ltin name

A

Jons Jakob Berzelius

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4
Q

arranged elements into groups simple substances that do not decompose by any means

A

Antoine Lavoiser

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5
Q

Made a list of element arranged in increasing atomic weight in spiral order

A

A.E Baguyer de chancourtois

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6
Q

Classified elements into group of 3 which he called triads

A

Johann dobenier

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7
Q

These elements in triads had similar chemical properties and orderly physical properties

A

Johann Dobenier

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8
Q

arranged the elements according to its atomic weight mass

A

Lothar Meyer & Dmitri Mendeleev

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9
Q

horizontal row of elements in the periodic table

A

Period

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10
Q

vertical column of elements in the periodic table

A

Group

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11
Q

General name for any element in the GROUP IA of the periodic table

A

Alkali Metals

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12
Q

Soft,shny,metals but they are only moderately reactive to water

A

Alkaline earth metal

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13
Q

are soft shiny metals that readily react with water

A

Alkali Metals

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14
Q

Group VIIA
-reactive gasses at room temperature

A

Halogens

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15
Q

Group VIII A
-unreactive gasses that undergo few,if any, chemical reaction

A

Noble Gas

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16
Q

element that has characteristics properties of luster, thermal conductivity, electrical conductivity and malleability

17
Q

element characterized by the absence of the properties of luster, thermal conductivity and malleability

18
Q

Metallic apperance,but hey are brittle and only fair conductors of electricity

A

Metalloids

19
Q

are the tendencies of certain elemental characteristics to increase or decrease as one progresses among a row or column of the periodic table of elements

A

The periodic trends

20
Q

chemical element is a measure of the size of its atoms usually mean or typical distance fom the nucleus to the boundary of the surrounding cloud of electrons

A

Atomic radius

21
Q

defined as the change in energy of a neutral atom when an Electron is added to the atom to form a negative ion

A

Electron Affinity