元素符號旁的數字代表不同的資訊:左下角是原子序(質子數);左上角是質量數(質子數+中子數)

利用化學性質來辨認並鑑定化合物

介紹各種化石為生物演化的最直接證據，並說明活化石非為化石。

靜電是什麼？靜電指的是電荷在物體表面不平衡分佈所引起的現象，當兩個物體互相摩擦時，電子會從一個物體轉移到另一個物體上，這種因為電子轉移而產生的電荷現象，就稱為靜電。靜電不會像電流一樣流動，它是暫時停留在物體表面的電荷，直到遇到導體或接地後才會釋放。以日常生活中的例子來說，當我們用塑膠梳子梳頭髮時，會發現頭髮變得容易吸在臉上，這是因為梳頭的過程中，電子從頭髮轉移到梳子上，使頭髮和梳子帶靜電，與臉產生吸附現象。

Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570) 洪琮欽 時間倒數 Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570)

瑪麗安是法國大革命時代下悲劇的女子，第一任丈夫拉瓦節，曾用熱質說解釋化學反應放熱、研發出「量熱瓶」，並把熱質命名為卡洛里。好景不常，革命爆發，拉瓦節死於斷頭臺，瑪麗安也被關入牢中，直到「他」出現……。

物理學家焦耳，運用老師道耳吞的理論，成功解釋電線發熱的現象。他進一步推論，電、熱、運動都是能量，只是表現形式不同。但在他發表的時候，竟遭一位陌生人質問，如何證明「熱能可以轉成電能」？

牛頓發現白光通過三稜鏡，與散成彩色的光，當所有顏色的光又聚集起來，又能變回白色。牛頓認為這些光都是不同種顏色的粒子，所以這是光是粒子的證據。只是這樣能打敗虎克嗎？

電解和陰離子、陽離子與陰極、陽極是什麼？電解是指化合物加到水中之後，電經過化合物水溶液之後，會把化合物分解的過程。陰、陽極是指電極的性質不同，法拉第認為電進入水中的電極稱為陽極，而電離開水的電極稱為陰極。陰、陽離子是指當可以被電解的化合物，在水中會變成帶電的離子狀態。而根據它們所帶的電和性質不同，分成會被陽極吸引的陰離子 ( 帶負電 )，以及被陰極吸引的陽離子 ( 帶正電 ) 兩種離子。

湯木生的學生拉賽福是個核能研究專家，為了探索原子的世界，以α粒子撞擊試圖打破原子的實驗，無意間發現有大部分的粒子都穿過去，只有少部分的粒子被反彈，認為原子的內部可能不像是一顆有西瓜籽散落的西瓜模型，而是⋯⋯