Atomic Structure Fill-in Notes
- An _____________________ is represented using a one or two letter abbreviation. The first letter is always capitalized. H, He, Cu
- An element's __________________ _________________, the number of _________________ (p+) is represented with a numeric subscript. 1H 2He Cu
- An element's mass number equals number of _____________________ (p+) plus _____________________ (no). It is represented with a numeric superscript. 1H 4He 64Cu
- These can be combined to form shorthand symbology for representing an element's __________________ _________________: H He 6429Cu
How do we find the number of proton, neutrons and electrons?
- Normally an atom has no __________ _________________.
- The positive charges and its negative charges __________________.
- Number of __________________ (p+) equals __________________ of electrons (e-).
- Carbon's atomic number = 6 so the number of p+= _________.
- Since carbon has 6 p+, it also has 6 __________________
- The number of neutrons (no) is the mass number - number of protons.
- For 126C, the number of no= 12 - 6 = __________________
- For 136C, the number of no= 13 - 6 = __________________
- For 146C, the number of no= __________________ = 8.
|Natural Carbon Isotopes||126 C||136 C||146 C|
|Number of protons (p+ )|
|Number of electrons (e- )|
|Number of neutrons (no )|
|Average Atomic mass for C||12.01|