Zusammenfassung der Ressource
Atoms &
Elements
- STRUCTURE
- protons, +, RAM1
- neutrons, 0 charge, RAM 1
- electrons, -, RAM 0
- number of electrons = number of protons
- Nucleon number= number of proton + number of neutron
- Proton number = number of proton =number of electron
- ISOTOPES
- Same element, different number or neutrons
- AVERAGE RAM =(% x mass of first isotope)+ (% x mass of second isotope)
- RADIOISOTOPES
- Radioactive: break down or decay over time,
giving out radiation
- Used to kill cancer cells
- Used as medical tracers
- Used to detect leaks in oil and gas pipes
- Used to sterilize things
- PERIODIC TABLE
- arranged in order of proton number
- rows are periods, columns are groups
- period number shows number of shells
- group number shows valency electrons
- valency electrons dictate how an element reacts
- METALS
- PROPERTIES
- conductors
- high melting/boiling point
- malleable and ductile
- sonorous
- high density
- form positive ions
- USES
- Electrical wiring
- Used in planes and rockets
- NON-METALS
- PROPERTIES
- non-conductor
- low melting/boiling point
- brittle
- dull
- form negative ions
- low density