Topic 1: Atomic structure and the periodic table Flashcards
(9 cards)
1
Q
what is the symbol that represents the atomic number?
A
Z
2
Q
what is the symbol that represents the mass number?
A
A
3
Q
isotopes have…
A
similar chemical properties but different physical properties.
4
Q
Why do the isotopes that have the same element display the same chemical characterstics?
A
they have the same number of electrons on their outer shells
5
Q
what is the definition for relative isotopic mass?
A
The average mass of an atom relative to one-twelfth of a carbon-12 atom
6
Q
what is the definition of relative atomic mass?
A
The average mass of an atom relative to one-twelfth of the mass of a carbon-12 atom
7
Q
what is a cation
A
a positive ion that is formed when an atom has lost electrons
8
Q
what is an anion
A
a negative ion formed when an atom gains eletrons
9
Q
A
