Some questions about atoms10pt

- 1.If the number of protons and electrons is different (not neutral), what will happen to the atom?How do we call this?What is the use of this kind of atom?

The atom will become an ion ( 離子 ) 無錯 我地叫佢 ion 離子
if an atom lose one or more electrons(e-) it will become a cation( 陽/正離子 )
and if it get one or more electrons it will become an anion( 陰/負離子 )

有乜用嘛..
好似鋰離子電池咁.. 鋰離子係走尼走去提供電力
詳細唔講啦 係yahoo 度好易搵到原理係點

事實上離子唔會單獨存在 好多時都會變成化合物

e.g. An atom with 10 protons and 11 electrons
呢粒野 基本上係唔會多粒e-的 因為佢已經達到
八隅體規則(octet rule)ge 要求 :: 電子排佈(electronic arrangement)(2,8)

搵第2粒野比例子 - 鈉
Na - 11protons and 11electrons (2,8,1)
Na^+ - 11protons and 10 electrons (2,8) (2,8,0)

- 氟
F - 9protons and 9electrons (2,7)
F^- - 9protons and 10electrons (2,8)

- 2.Atoms are very small. People cannot cut them off for a look.Why people can know there are protons, neutrons and electrons inside an atom?
因為呢個世界有電子顯微鏡= =]

我唔知我答唔答到你想要既程度,,
不過就我所學:
1.atom係原子,,即係不帶charge的,,所以proton no.同electron no. 一定相同
如果唔係個d就係ion,,[分+ and -]
atom入面只會neutron no.可能唔同proton/electron
2.atom定義係不可分解為更小的物質,但係隨住科技發展,其實比electron更細的物質都被發現ga啦[eg.neutrino中微子]
但係點發現ga呢?...我都唔清楚- -"

建議你可以參考下d web site,,講多好多同好清楚ga,
www.chemguide.co.uk/atoms/properties/gcse.html
希望幫到你啦xp