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Some questions frequently asked by users : how do i know the chemical formula for nitrogen?
another chemistry question, my worksheet is asking me to write the chemical formula for nitrogen, and it says the answer is n2. where would they get that from and how do you figure it out?science worksheet. help. i need my answered checked. :p?
hey, i already did this worksheet now i just need them checked before i turn them in. i am pretty sure i'm right. why is oxygen an element? a. it cannot be broken down into a simpler substance through chemical means. b. it combines with hydrogen. c. it burns. d. it is essential to life. how do elements form? a.through fusion in stars and supernova b. through chemical reactions c. through the cooling of molten lava d. through the evaporation of seawater what is the expression of the chemical composition of a compound? a. electron arrangement b. element formula c. chemical formula d. bond arrangement which of the following is a common property of metals? a. conducts electricity b. insulates from electricity c. has very little reactivity d. is liquid at room temperature which choice represents a group of elements with common characteristics? a. silver, iodine, helium b. oxygen, hydrogen, lithium c. copper, oxygen, silver d. copper, gold, silver elements that easily give up electrons are called __________. a. nonmetals b. metalloids c. noble gases d. metals elements can be broken down through __________ processes. a. nuclear processes, but not chemical b. both chemical and nuclear c. only biological d. chemical processes, but not nuclear if a material is ductile, it is most likely a __________. a. nonmetal b. metalloid c. noble gas d. metal sodium (na) is a highly reactive metal and chlorine (cl) is a poisonous gas. which compound do they form when they chemically combine? a. table salt b. sodium hydroxide c. chlorine bleach d. a poisonous metal what does the atomic number represent? a. number of protons in an atom b. total number of protons, neutrons, and electrons in an atom c. mass of an atom d. number of electrons in an atomhelp finding 'chemical calculations' worksheet with answers on internet - gsce level?
so ive got my unit 2 chemistry module in a week and i'm sorted but need extra practice with the calculations section. this includes empirical formula, reacting masses, percentage yield, atom economy and so on. does anyone know any good websites that allow you to print off worksheets with answers seperately, all i can find is irrelevant questions with no asnwers :( helllllp :) know idea what that is as i live in the uk, but waterstones doesnt sell anything like this as its only a small topic so worksheets is my only hope. and anything i buy of the internet won't arrive in time...
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