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3. Atoms elements and compounds 3.1

Anna JEFFERIS Chemistry IGCSE Inglés 10 fichas

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1ATOMSSmallest particles of matter that cannot be broken down into anything more simple by chemical means
2SUBATOMIC PARTICLES•Protons
•Neutrons
•Electrons
no of electrons = number of protons
3PROTONSCharge : Positive
Mass : 1
Location : In the nucleus of the atom
4NEUTRONSCharge : 0
Mass : 1
Location : In the nucleus of the atom
5ELECTRONSCharge : negative
Mass : 0
Location: Electron cloud
6ATOMIC/PROTON NUMBERNumber of protons in an atom
7NUCLEON/MASS NUMBERNumber of PROTONS and NEUTRONS in an atom
8ISOTOPEAtoms of the same element with the same number of neutrons but a different number of PROTONS - therefore have similar physical propertied but different chemical properties
9RADIOACTIVE ISOTOPES & Uses• Emit radioactivity from the nucleus and decay into more stable atoms
Uses: medical = used to STERILIZE medical equipment ; used to treat cancer
Industrial = used to detect leaks in oil and gas pipelines
10NON-RADIOACTIVE ISOTOPESIsotopes which don't show radioactive decay