Atom structure

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Chemical Nomenclature

Szerző: NA - 10SP - Castlebrooke SS (2692)

Periodic Table Trends

Szerző: Mila Alam

Emotion

Szerző: umwe bejo

Exam 1

Szerző: Charles Igwe

Atomic structure

Gains or loses electrons

Ions

Lose electrons

ions are positively charged

metals

cations

Gain electrons

ions are negatively charged

non-metals

anions

Electronic configuration

Valence electrons

nature of elements determined by the number of valence electrons

4-8 non-metalic

1-2 metallic

aliminium with 3 is an exception

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

atoms of same elements

phosphorus

chlorine

oxygen

hydrogen

nitrogen

of compounds

atoms of different elements

hydrochloric acid

carbon dioxide

water

ammonia

methane

Isotopes

different number of neutrons

different physical properties

boilling point

melting point

density

same atomic number

same chemical properties

same electronic configuration of both isotopes

atoms of same element

Atoms consist of

Protons

positive charge

Neutrons

Electrons

negative charge