1.3: Classifying Elements

Question 1

Define periodic law

Answer 1

chemical and physical properties or elements repeat themselves in regular intervals, when elements arranged in order in increasing atomic number

Question 2

Define family/group

Answer 2

Vertical column of table, similar chemical properties element

Question 3

Define period

Answer 3

horizontal row of elements where properties change from metallic to non-metallic

Question 4

Define standard ambient temperature & pressure. (SATP)

Answer 4

(unless stated otherwise) the descriptions of the materials. Temperature: 25 & pressure: 100kPa

Question 5

Define metals

Answer 5

shy, bendable, & good conductors of heat & electricity

Question 6

Define nonmetals

Answer 6

(opposite of metals)

Question 7

Define malleable

Answer 7

ability to be hammered into a thin sheet

Question 8

Define alkali metals

Answer 8

group 1, soft, silver-coloured and very reactive to water

Question 9

Define alkaline-earth metals

Answer 9

group 2, light, reactive to air

Question 10

Define halogens

Answer 10

group 17, extremely reactive

Question 11

Define noble gases

Answer 11

group 18 not reactive

Question 12

Define main group elements

Answer 12

group 1, 2, 12 to 18,

Question 13

Define transition elements

Answer 13

are elements groups 3 to 11