Which scientist first discovered electrons?
Democritus
Ernest Rutherford
Aristotle
J.J. Thomson
Which scientist is responsible for the discovery of the nucleus?
Niels Bohr
J.J. Thomson
Ernest Rutherford
John Dalton
A molecule of Nickel (Ni) element has how many protons?
28
What is this model called?
Plum Pudding Model
Planetary Model
Elemental Model
The Skibidi Model
Who was the first known scientist to develop the concept of the atom?
Democritus
Aristotle
J.J. Thomson
John Dalton
What are two atoms with the same number of protons but different numbers of neutrons called?
amu
twin molecules
ions
isotopes
What is this model called?
Chocolate Chip Cookie Model
Planetary Model
The Big Bang Theory Model
Plum Pudding Model
The elements of the periodic table are arranged ____________.
by their atomic number
When they were discovered
Alphabetically
How much the scientists liked each one
The cluster of particles in the center of a molecule is called the...
black hole
electron cloud
nucleus
proton cluster
How many protons does a molecule of Neon (Ne) have?
10
Which units to scientists use to measure the subatomic particles in atoms?
proton units (pu)
atomic mass units (amu)
subatomic particle units (spu)
millimeters (mm)