Science 9 - Study - Topic 3&4
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32 Terms
Law
To summarize an observation
Theory
To test the observation (Thousands If Not Millions Of Times)
Who created the periodic table?
Dmitri Mendeleev
Define the law of conservation of mass
mass is neither created nor destroyed
What is a valence electron?
electrons in the outermost shell
How do you find the number of neutrons in an atom?
mass number - atomic number
What is the plum pudding model missing?
Neutrons And Nucleus and the shells
Where is Alkali metals located on the periodic table?
Group 1
where is the noble gases on the periodic table
Group 18
Where are the Halogens located on the periodic table?
Group 17
where's nonmetals at on periodic table?
Hydrogen - Groups 14-18 (Right Side Of The Stair Case)
why do elements in the same group tend to behave similarly during chemical reactions?
Because they have the same amount of Valence (electrons)
Metals: State at Room Temperature
solid except for mercury (a liquid)
Metals appearance
Shiny lustre
Metals conductivity
good conductors of heat and electricity
Metals Malleability and Ductility
malleable and ductile
Who Created The Bohr Model?
Danish physicist Niels Bohr in 1913.
Who Created The Planetary Model?
RutherFord
What does the Planetary Model Have, And What Is It Missing?
It has electrons, Nucleus, And Protons, but does not have neutrons.
Where are Transition Metals Located In The Periodic Table?
Located in the central block of the periodic table, specifically groups 3 to 12.
Definition Of Sub Atomic Particles
Smaller constituents of atoms, including protons, neutrons, and electrons, which determine the atom's properties and behavior.
Who Created The “Plum Pudding Model”?
J.J. Thompson
Who Created The “Cloud Model”
Erwin Schrödinger and Werner Heisenberg
What Is The Cloud Model Missing?
Nothing That We Know Of
Non Metals: State at Room Temperature
some gases, some solids
Non Metals: Apperance
Not Very Shiny
Non Metals: Conductivity
poor conductors of heat and electricity
Non Metals: Malleability and Ductility
brittle, not very ductile
Metalloids: State At Room Temperature
solids
Metalloids: Appearance
Can be shiny OR dull
Metalloids: Conductivity
may conduct electricity, usually poor conductors of heat
Metalloids: Malleability and Ductility
brittle, not ductile
