nuclear chemistry (unit 2) Flashcards
1
Q
what is nuclear chemistry?
A
changes in the structure of the atoms particular nucleus
2
Q
bands of stability
A
- small elements- ratio of protons : neutrons is 1:1
- larger elements- ratio is 1 : 1.5
- largest elements (above 83) is not stable at all
3
Q
what are isotopes?
A
less stable atoms, not standard
they have a different number of neutrons and different mass than the most stable atoms/common elements
4
Q
what are ions?
A
an atom that gains or loses a electron (charged atom)
5
Q
what is a cation?
A
positive ion (+) fewer electrons
metals give away electrons
6
Q
what is an anion?
A
negative ion (-) more electrons
nonmetals on the left side of periodic table because their orbitals need electrons
7
Q
chemical notation
A
top number is atomic mass
bottom number is atomic number
+x is the charge (excess or lack of electrons)
8
Q
calculating average atomic mass
A
%(mass) + %(mass) + %(mass)
divide percent by 100 before multiplying
