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Atomic theory
Subatomic Particles
Isotopes
Name that element
Misc.
100
He thought all matter was made of small particles which he called atoms.
Who is Democritus
100
The positively charged subatomic particle
What is the proton
100
Isotopes are different forms of the same element with different numbers of what?
What is neutrons
100
I have an atomic number of 26. What element am I?
What is Iron
100
The electrons in the outer energy level or ring of an atom
What is valence electrons
200
He discovered the neutron in 1932
Who is Chadwick
200
The negatively charged subatomic particle
What is electron
200
What is the mass number of an isotope equal to?
What is the protons plus neutrons
200
I have a mass number of 14 and 6 protons. What element am I?
What is carbon
200
Matter made of only 1 type of atom
What is element
300
He discovered that there was a positively charged dense center in atoms
Who is Rutherford
300
The subatomic particle with no charge
What is neutron
300
The nuclear symbol of an isotope includes the chemical symbol and what 2 other pieces of information?
What is mass number and atomic number
300
I have an atomic mass of 87.62. What element am I?
What is Strontium
300
an explanation of an event or object that has been tested and retested and is supported by a large amount of evidence
What is a theory
400
He experimented with a cathode ray tube and discovered the electron
Who is Thomson
400
The subatomic particle that determines the identity of an atom
What is proton
400
Isotopes with unstable nuclei that undergo random spontaneous nuclear decay are considered this.
What is radioactive
400
I have a mass number of 35 and 18 neutrons. What element am I?
What is Chlorine
400
Atoms that have gained or lost electrons and have an electrical charge.
What are ions
500
He said that electrons move around the nucleus in set paths like the planets orbit the sun
Who is Bohr
500
The 2 subatomic particles found in the nucleus
What are protons and neutrons
500
The weighted average of all the isotopes of an element is the ?
What is atomic mass
500
I have a mass number of 137 and 82 neutrons. What element am I ?
What is Cesium
500
What electrical charge would an oxygen ion have?
What is -2