Vocabulary
Elements
The History of the Atomic Model
Elements
Vocabulary
100
The group 17 non metals.
What is Halogens?
100
H
What is Hydrogen?
100
Democritus
Who was the first person to come up with a theory of an atom?
100
Si
What is Silicon?
100
An arrangement of elements showing the repeating pattern of their properties.
What is the Periodic Table?
200
These have some properties of metals, and some properties of non metals.
What are metalloids?
200
Hg
What is Mercury?
200
The Cloud Model
What is the atomic model that showed electrons had levels?
200
Kr
What is Krypton?
200
Particles in the nucleus that have no charge.
What are neutrons?
300
Atoms with the same number of protons and a different number of neutrons.
What are isotopes?
300
O
What is Oxygen?
300
A smooth hard red ball that can't be broken up into smaller pieces.
What is John Dalton's idea of an atom?
300
Na
What is Sodium?
300
The metals on the periodic table that are the most reactive.
What are the Alkali Metals?
400
Every atom of the same element has the same number of protons. It is known as the _____ on the periodic table.
What is atomic number?
400
Au
What is Gold?
400
The first model to discover that atoms contained negatively charged atoms called electrons.
What is J.J. Thomson's model?
400
Fe
What is Iron?
400
Substances that can conduct electric current under some conditions, but not under others.
What are semiconductors?
500
Elements that are good conductors of electric currents and heat.
What are metals?
500
Pu
What is Plutonium?
500
New Zealand
What is Ernest Rutherford's country of origin?
500
Ne
What is Neon?
500
The ease and speed in which an element combines, or reacts with other substances
What is reactivity?
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