彈 duan7 tang5 duain7

Let us hear Professor Lim Lung Lung tell us how to say 彈

tang5 kim5 彈琴｜弹琴	to play a zither	tan2 qin2彈琴｜弹琴
tang5gêng1 彈弓｜弹弓	catapult, slingshot	dan4gong1 彈弓｜弹弓
êng7 tang5gêng1 duan7 ziao2 用彈弓彈鳥  to use a catapult to shoot a bird
tang5 zi2 zêg8 hui1 gang1 彈指一揮間｜弹指一挥间	in a flash (an idiom)	tan2zhi3yi1hui1jian1 彈指一揮間｜弹指一挥间
duan7 tao5kag4 彈頭殼｜弹头壳	to hit one’s forehead with one’s finger	彈腦門｜弹脑门
tao5kag4 頭殼｜头壳	forehead	nao3men2 腦門｜脑门
za3tang5 炸彈｜炸弹	bomb	zha4dan4 炸彈｜炸弹
ng5duain7 黃彈｜黄弹	Clausena lansium, wampee or wampi, a yellow skinned fruit	huang2pi2 黃皮∣黄皮

I added za3tang5 into the list for I thought you would like to know what it means. I did not add ze2tang5 子彈 which means bullet because we have our own words which are cêng3zi2 銃子 or cioⁿ1zi2 槍子 I have had enough of this whole scale import of Mandarin words. We can learn these after we have mastered our own words! 

duaⁿ7 tao5kag4  彈頭殼｜弹头壳 to use one's finger to hit another person's forehead