Atomic structure Flashcards
What is the relative charge and mass of proton
Charge +1
Mass 1
What is the relative charge and mass of an electron
Charge -1
Mass 1/1840
What is the relative charge and mass of a neutron
Charge 0
Mass 1
What is the atomic number
The number of protons in an atom
Is the atomic number lower or lower or larger
Lower
What is the mass number
The total number of protons and neutrons in an atom
What indicates the number of protons
The atomic number
What indicates the number of electrons
The atomic number as the number of protons is equal to the number of electrons
How do you work out the number of neutrons
Mass number - atomic number
What are ions
Ions are charged particles resulting from unequal number of protons and electrons
How are ions formed
Ions are formed when an atom loses or gains electrons in order to become stable
What are isotopes
Isotopes are atoms of an element with the same atomic (same amount of protons) number and different mass number ( different number of neutrons)
What is relative atomic mass
The mass of an atom compared to the carbon-12 isotope which has a mass of exactly 12
Why are atoms neutral
Atoms are neutral because they have equal numbers of protons and electrons
