by Mindomo Team 1 year ago 304704 ions are positively charged metals cations ions are negatively charged non-metals anions 4-8 non-metalic 1-2 metallic aliminium with 3 is an exception atoms of same elements phosphorus chlorine oxygen hydrogen nitrogen atoms of different elements hydrochloric acid carbon dioxide water ammonia methane boilling point melting point density same electronic configuration of both isotopesAtom structure
Atoms are composed of neutrons, electrons, and protons. Electrons are negatively charged, while protons have a positive charge. Neutrons carry no charge. The arrangement of electrons around the nucleus in different shells determines the electronic configuration of an atom.
Atomic structure
Gains or loses electrons
Ions
Lose electrons
Gain electrons
Electronic configuration
Valence electrons
nature of elements determined by the number of valence electrons
outermost shell=shell furthest from the nucleus
find in outermost occupied shell of an atoms
How to find electron configuration?
electrons start occupying new shells when previous ones are occupied
arrange electrons in shells
find the derived number of electrons
find the proton number of the atom
each shell can occupy a certain number of electrons
shells number 1,2,3 and so on
electrons arranged around the nucleus in the shells of an atom
Combines chemically
Molecules
of elements
of compounds
Isotopes
different number of neutrons
different physical properties
same atomic number
same chemical properties
atoms of same element
Atoms consist of
Protons
positive charge
Neutrons
Electrons
negative charge