Which substance is an element?
A) NO2
B) NaCl
C) N2
D) CH4
Correct Answer:
Verified
Q6: The quantity 0.0000064 g expressed in scientific
Q7: Which is not a pure substance?
A)Helium
B)Copper wire
C)Air
D)Sucrose
Q8: Which diagram(s) best represent(s) only molecules?
Q9: Which square(s) contain(s) only one or more
Q10: Which square(s) contain(s) only an element?
Q12: The quantity 8.7 × 105 g expressed
Q13: Which symbols represent only elements that are
Q14: A substance that can be broken down
Q15: Which diagram(s) best represent(s) only diatomic molecules?
Q16: Which squares contain mixtures? 
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents