WorksheetsElements & Compounds Review
Total questions: 13
Worksheet time: 36mins
When two or more elements combine chemically, they form _________.
DNA
atoms
molecules
compounds
Which of the following are known as the building blocks of matter?
elements
atoms
protons
none of the above
Which of the following substances cannot be decomposed into a simpler substance?
water
H2 Ohydrogen H
salt NaCl
ammonia NH3
The chemical formula for artificial sweetener is
C7H5NO3S How many different elements are in the artificial sweetener?17
5
15
4
Which of the following is a compound?
He
CO
Si
Co
What is made of only 1 type of atom?
atoms
elements
compounds
mixtures
Which one is a compound?
Ni
F
Re
NaCl
One way to tell how many elements a compound has is to..
multiply the number
count the capital letters
add up all the numbers
count the letters
Na2CO3
Which of the following are ALL elements?
NaCl, CaCo, SiO
O, Mg, Ca, SiO
Al, O, Mg, Ca
NaCl, O, Ca
