quiz 3 Flashcards
Name the 3 subatomic particles
protons,neutrons and electrons
State the overall charge on an atom
0
State how large the nucleus of an atom is relative to its radius
approximately 1/10000th the size
Whats an abundance?
the percentage of atoms in a sample that are a particular isotope
State the information provided by the atomic number of an atom
The number of protons
State how the number of neutrons in an atom is calculated
mass number- atomic number
In the modern atomic model, name the subatomic particles found in the nucleus
protons and neutrons
State the approximate radius of a typical atom
approximately 0.1nm
Explain why atoms have an overall neutral charge
Protons are positive and electrons are negative
Atoms have equal number of protons and electrons
so the charges sum to zero
State the information provided by the mass number of an atom
The number of protons plus the number of neutrons
Define isotopes
Atoms of the same element with different number of neutrons
Describe the difference between mass number and relative atomic mass
mass number is the number of protons and neutrons in one atom
relative atomic mass is an average value that takes account of isotopes
State the relative masses of the 3 subatomic particles
protons: 1
Neutrons: 1
Electrons: very small
