Topic 3- Atomic Structure Flashcards
What are atoms and molecules?
Molecules are more than one type of atom chemically bonded together.
What is the structure of an atom in terms of the positions, relative masses and relative charges of sub-atomic particles?
.
What is meant by the terms atomic number, mass number, isotopes and relative atomic mass (Ar)?
Atomic number = number of protons
Mass number = total number of protons and neutrons
How do you calculate the relative atomic mass of an element (Ar) from isotopic abundances?
Ar = ( mass x abudence)/ (abundance)
How do you deduce the electronic configurations of the first 20 elements from their positions in the Periodic Table?
.
How do you use electrical conductivity and the acid-base
character of oxides to classify elements as metals or non-metals?
.
How do you identify an element as a metal or a non-metal according to its position in the Periodic Table?
.
How is the electronic configuration of the main group element is related to its position in the Periodic Table?
.
Why elements in the same group of the Periodic Table have similar chemical properties?
.
Why do the noble gases (Group 0) do not readily react?
.
Isotope
Atoms of the same element with the same number of protons (same atomic number) but different numbers of neutrons (therefore different mass number)
Electron shell/energy level
Where electrons orbit the nucleus
Electron Structure/ Configuration/Arrangement
Shows the number of electrons on each shell on an atom e.g. Na =2,8,1
Valence Shell/Electrons
The outermost shell of electrons (highest energy level)
Group
A vertical column of elements on the Periodic Table
