SAS 03 - CHEMISTRY

Question 1

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

Answer 1

Periodic Table

Question 2

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

Answer 2

Periodic law

Question 3

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

Answer 3

Jons Jakob Berzelius

Question 4

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

Answer 4

Antoine Lavoiser

Question 5

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

Answer 5

A.E Baguyer de chancourtois

Question 6

Classified elements into group of 3 which he called triads

Answer 6

Johann dobenier

Question 7

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

Answer 7

Johann Dobenier

Question 8

arranged the elements according to its atomic weight mass

Answer 8

Lothar Meyer & Dmitri Mendeleev

Question 9

horizontal row of elements in the periodic table

Answer 9

Period

Question 10

vertical column of elements in the periodic table

Answer 10

Group

Question 11

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

Answer 11

Alkali Metals

Question 12

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

Answer 12

Alkaline earth metal

Question 13

are soft shiny metals that readily react with water

Answer 13

Alkali Metals

Question 14

Group VIIA
-reactive gasses at room temperature

Answer 14

Halogens

Question 15

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

Answer 15

Noble Gas

Question 16

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

Answer 16

metal

Question 17

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

Answer 17

Non Metal

Question 18

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

Answer 18

Metalloids

Question 19

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

Answer 19

The periodic trends

Question 20

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

Answer 20

Atomic radius

Question 21

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

Answer 21

Electron Affinity