Particles
History of the Atom
The Nucleus
By the Numbers
Change That Atom
100
This particle has a positive charge.
What is a proton?
100
He was the first scientist to combine the Greek theory of the atom with the idea of elements and came up with the solid sphere model of the atom.
Who is Dalton.
100
It is the area of the atom called the nucleus.
What is the center of the atom?
100
Oxygen has an atomic number of 8 and this many protons.
What is 8?
100
The release of nuclear particles and energy is called this.
What is radioactive decay?
200
This particle has a neutral charge.
What is a neutron?
200
He discovered electrons and came up with the cookie-dough model of the atom.
Who is Thomson.
200
These 2 particles are found in the nucleus.
What are protons and neutrons?
200
Florine has an atomic number of 9,an atomic mass of 19 and this many neutrons.
What is 10?
200
The changing of one element into another through radioactive decay is called this.
What is transmutation.
300
This particle has a negative charge.
What is an electron?
300
He discovered the neutron and came up with the planetary model of the atom.
Who is Rutherford?
300
This number is the total number of protons and neutrons in an atom?
What is the atomic mass (weight)?
300
Sodium has an atomic number of 11, a mass of 23 and this many neutrons.
What is 12?
300
A Bohrium atom, atomic number of 107, will have an atomic number of this if it loses an alpha particle (pew).
What is 105.
400
This particle is made of 2 protons and 2 neutrons ejected from the nucleus.
What is an alpha particle.
400
He came up with the electron cloud model of the atom.
Who is Bohr.
400
These are atoms of the same element that have different numbers of neutrons.
What are isotopes?
400
If a 100g sample of an element has a half-life of 1 hour, this much will be left after 2 hours.
What is 25g?
400
A Bohrium atom, atomic number of 107, will have an atomic number of this if it loses an beta particle (pew).
What is 108.
500
When a neutron splits into a proton and an electron, it's called this.
What is a beta particle.
500
His experiment with cathode rays and magnets tested Dalton's theory of the atom.
Who is Crookes?
500
This force holds nucleus together.
What is the strong nuclear force?
500
If a 32g sample of an element has a half-life of 10 seconds, it will take this many seconds to decay down to 2g.
What is 40?
500
A Ruthenium atom, atomic number of 44, will have an atomic number of this if it loses an alpha particle (pew).
What is 42?
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