BasicChemistry1AtomicStructure
Matterhasmassa
dtakesupspaceAtomsarebasicbuildi
gblocksofmattera
dca
otbechemicallysubdividedbyordi
arymea
s
Boththeproto
sa
d
eutro
sresidei
the
ucleusProto
shaveapositivecharge
eutro
shave
ochargetheyare
eutralElectro
sresidei
orbitalsarou
dthe
ucleusTheyhavea
egativecharge
Itisthe
umberofproto
sthatdetermi
estheatomic
umberThe
umberofproto
si
a
eleme
tisco
sta
tbut
eutro
umbermayvarysomass
umberproto
s
eutro
smayvary
1。原子结构物质有质量,占空间。原子是物质的基本组成物,不能用普通的方法进行化学细分。质子和中子都驻留在原子核中。质子有一个正电荷,中子是不带电的,它们是中性的。电子在原子核周围的轨道上。他们有一个负电荷()。它是确定原子序数的质子数。在一个元素中的质子的数量是恒定的,但中子数可能会有所不同,所以质量数(质子中子)可能会有所不同。
Thesameeleme
tmayco
tai
varyi
g
umbersof
eutro
stheseformsofa
eleme
tarecalledisotopes
Thechemicalpropertiesofisotopesarethesamealthoughthephysicalpropertiesofsomeisotopesmaybe
differe
tSomeisotopesareradioactivemea
i
gthey