Chapter 9 And 20 Ecams

Front 1

strong force

Back 1

cuases protons and nuetrons to be atrracted to each other

Front 2

radioactivity

Back 2

process of nucleur decay

Front 3

alpha particle

Back 3

two protons two nuetrons with eltrical charge of 2+

Front 4

transmutation

Back 4

process of changing one element to another through nucleur decay

Front 5

beta particle

Back 5

neutron decays into a proton and releases an elctron at high speed

Front 6

GAMMA rays

Back 6

penetrsting electromagnetic waves that carry energy but have no mass charge

Front 7

cloud chanmber

Back 7

detects alpha or beta particles by mean of a trail of condensed vapor

Front 8

bubble chamber

Back 8

detects radioactivty particles by means of a bubble train in superheated liquid

Front 9

geiger contour

Back 9

measures radipactivty ny producing an eletric current when radiation is present

Front 10

nuclear fission

Back 10

process of splitting a nucleus into two nuclei with smallers masses a large amount of energy is released

Front 11

chain reaction

Back 11

an ongoing series of fission reactions

Front 12

critical mass

Back 12

amount of fissionable material requred to continue a reaction at a constant rate

Front 13

nuclear fusion

Back 13

two nuclei with low masses are combined to form one nucleus or larger mass

Front 14

tracer

Back 14

find or keep track of molecules in an organissm

Front 15

metal

Back 15

elemtnt that typically hard shiny solid is mallable and good conductor of heat and electricty

Front 16

mallable

Back 16

ablitily of metals to be hammers or rolled into thin sheets

Front 17

metallic bonding

Back 17

occurs because elctrons move freely among a metals psotively charged ions

Front 18

radioactive bonding

Back 18

elements such as radium whos nucleus breaks down and emits particles

Front 19

transition elements

Back 19

elements in group 3-12 of periodic table occur in nature as uncombined element

Front 20

non metal

Back 20

usally gas or brittle solid at room temp not mallable or ductile

Front 21

diatomic molecule

Back 21

molecule that consist of two atoms of the same elemnets

Front 22

metalloid

Back 22

elements that share some propeties with metals

Front 23

allotp[e

Back 23

diffrent form of the same element ha ving diffrent molecule structures

Front 24

semiconductor

Back 24

elements conduct eletric currents under certain conditions

Front 25

transuranium

Back 25

have more than 92 protons