The Guys
The Atom Category
Elements
The Table
Misc.
100
The first 3 men credited with contributing to Atomic Theory
Who are Democritus, Dalton & Thomson
100
The smallest particle into which an substance can be divided & still maintain the characteristics of that substance.
What is an atom?
100
Elements in the same group have ___ properties
What are similar properties?
100
Elements are arranged by this on the periodic table.
What is the atomic number?
100
Sodium and Potassium belong to this group of elements (name, not number)
What are the alkali metals?
200
Some particles were deflected but most went straight through.
What is Rutherford's Gold Foil Experiment
200
How to calculate neutrons.
What is atomic mass - atomic number?
200
Shiny, malleable, ductile and very conductive elements.
What are metals?
200
This is why Mendeleev's table was useful.
What is allowed for elements that hadn't been discovered / produced?
200
On the Periodic Table physical and chemical changes take place __ __ __
What is across the periods?
300
A positively charged "blob" with negative charges throughout.
What is Thomson's Plum Pudding Model?
300
Two sub-atomic particles that make up the nucleus of an atom.
What are the protons and neutrons?
300
Two elements combined in specific proportions.
What is a compound?
300
Groups 3 - 12 are good conductors of these things.
What are electricity and thermal energy?
300
Dense & Positively charged.
What is the nucleus?
400
Same element = same atoms
Who is Dalton?
400
An atom with 44 protons, 47 neutrons and 44 electrons would have an atomic mass of
What is 91?
400
Isotopes exist because atoms of the same element have different numbers of these.
What are neutrons?
400
Columns are called __ and Rows are called __.
What are groups / families ... periods?
400
Chemical formula for Calcium Carbonate (chalk) and Ratio of the elements in the formula.
What is CaCO3? What is 1:1:3?
500
disagreed about how electrons traveled
Who are Bohr and Schroedinger & Heisenberg?
500
The negative charges in Thomson's plum pudding model.
What are electrons?
500
Halogens are grouped together because of this.
What is reactivity / # of electrons in outer shell?
500
Order of element types from left to right.
What is metals, metalloids, non-metals, inert gases?
500
The ratio of Iron to Oxygen in Rust (Fe2O3)
What is 2:3?
M
e
n
u