512765
Descripción
Mapa Mental por lucy.wright73, actualizado hace más de 1 año
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Creado por lucy.wright73
hace más de 10 años
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Atomic Structure
- +ve charged nucleus containing most of mass,
surrounded by atomic shells with orbiting
electrons containing negligible mass
- Atomic/proton number gives no. of
protons in nucleus; also defines the
element and gives no. of electrons in
an ATOM
- No. of electrons is same as no. of protons in an
ATOM, so atoms are electrically neutral
- No. of electrons is different to no. of
protons in an ION so charged: +ve = lost
electrons, -ve = gained electrons; find
original no. of electrons in atom (atomic
no.) then add/subtract
- ISOTOPES - ATOMS OF AN ELEMENT
WITH DIFFERENT NUMBERS OF
NEUTRONS AND DIFFERENT MASSES
- Mass/nucleon number is no. of protons
plus no. of neutrons. Find no. of
neutrons by subtracting proton no. from
mass no.
- Different isotopes of same element react in
same way - electrons involved in chemical
reactions, not neutrons
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