Negatively charged subatomic particles.
Proton
Neutron
Electron
Nucleus
Subatomic particle with no charge.
Positively charged subatomic particle.
Central dense core of an atom responsible for its mass.
Philosopher who was among the first to suggest the existence of atoms.
Bohr
Rutherford
Dalton
Democritus
The mass of an electron is equal to the mass of a neutron.
Rutherford’s gold foil experiment proved that atoms are mostly empty space with a dense, positively charged nucleus.
The mass number of an atom is equal to
Weighted average of masses of all isotopes of an element
Protons plus Neutrons
Number of Neutrons
Number of Protons
The atomic mass of an atom is equal to
An isotope of neon has a mass number of 22. How many neutrons in this isotope?
22
20
12
10
An isotope of lead has a mass number of 206. How many protons in this isotope?
82
124
Calculate the atomic mass of an atom with the following isotope data: Mass : Abundance 36.00 : 75.77% 37.00 ; 24.23%
36.14
36.68
36.48
36.24