1.
a) Box 2
b) Box 3
c) Box 1
d) No, none of the boxes contain a mixture. A mixture would contain more than one type of particle (element or compound). Box 1 contains only one type of atom, Box 2 contains only one type of molecule (of an element), and Box 3 contains only one type of molecule (of a compound).
2.
Elements: a) Li, b) N₂, d) Cl₂, e) S₈
Compounds: c) CO, f) NaCl
3.
a) HCl: 2 elements (H, Cl)
b) CaCO₃: 3 elements (Ca, C, O)
c) HNO₃: 3 elements (H, N, O)
d) H₂SO₄: 3 elements (H, S, O)
e) CH₃OH: 3 elements (C, H, O)
4.
a) N₂: 2 atoms
b) CO₂: 3 atoms
c) O₃: 3 atoms
d) CH₄: 5 atoms
e) SO₂: 3 atoms
f) C₂H₄: 6 atoms
5.
a) POCl
b) HNO₃
c) C₂H₅OH
d) C₆H₆
6.
O₂, CO₂, H₂O, NH₃
Parent Tip: Review the logic above to help your child master the concept of element or compound worksheet.
