All about the Atom
A pure substance that is the smallest building block of matter.
What is the atom
Carbon has a mass number of 12 and an atomic number of 6, and this many protons
what is 6 protons
He is the Father of the Modern Atomic Theory.
Who is John Dalton?
If a neutral atom has 20 protons, what is the number of electrons it will have
What is 20
This type of nuclei are radioactive
What is an unstable nuclei
The three subatomic particles of the atom.
What is proton, neutron, and electron?
You can find this when you add the number of protons and the number of neutrons
what is the mass number
He stated that at its smallest, ATOMOS is indivisible and had a lot of empty space.
Who is Democritus?
With a mass number of 84, and neutrons of 48, what are the number of protons
What is 36
This force is responsible for radioactive decay
What is weak force
The number of neutrons and protons in an atom.
What is mass number?
This space around the nucleus is where you will find electrons.
electron cloud
He established the Plum Pudding Model of Atomic Theory.
Who is JJ Thomson?
Isotope or Element protons: 23 Neutrons: 35 protons: 23 Neutrons: 37
What is isotopes
These are the three types of radiation
The subatomic particle that identifies the atom.
What is the proton?
The atomic number of a sodium atom that has 11 protons and 12 neutrons, and this many electrons
What is 11
His Gold Foil Experiment led to the discovery of the positively charged dense nucleus and its protons.
Who is Ernest Rutherford?
Copper has an atomic number of 29 and a mass number of 64, it has this many protons, neutrons and electrons
what is 29 protons 35 neutrons 29 electrons
This element can determine the age of an object.
what is carbon 14
The dense positively charged center of the atom.
What is the neucleus
A neutral atom that has a different number of neutrons than it has protons.
What is an isotope
Though outdated, his atomic model is still used for convenience when explaining energy levels.
Who is Niels Bohr
mass number of 108, protons of 47, has this number of neutrons
What is 61
The original term, dating to Ernest Rutherford's discovery of the principle in 1907, was "half-life period", which was shortened to this term in the early 1950s.
What is half life