Topic 7 (Atomic Structure) Flashcards
What is the charge and relative mass of an electron?
-1 charge and negligible mass
What is the charge and relative mass of a proton?
+1 charge and 1 unit of mass
What is the charge and relative mass of a neutron?
No charge and 1 unit of mass
How is the nucleon/mass number calculated?
Number of protons + number of neutrons
What are isotopes?
Atoms with the same number of protons but different numbers of neutrons
What are cations and anions?
Cations are positive ions that have lost electrons. Anions are negative ions that have gained electrons.
What ion does sulfur form?
Anion with +2 charge
What is the atomic number?
Number of protons
How is relative atomic mass calculated?
Sum of mass numbers of each isotope multiplied by their percentage natural abundance
Calculate the mass number of silver if it has two isotopes, Ag-107 with 52.8% abundance and Ag-109 with 47.2% abundance.
107.9
The chemical properties of an element are dependent on…
the number of valence electrons
Elements in the same group have the same number of…
valence electrons
Elements in the same period have the same number of…
electron shells
Write the electronic configuration of phosphorus.
2.8.5
Write the electronic configuration of chlorine.
2.8.7
