Counting Atoms Worksheet - Weebly
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Date:____________ Hr:_________
Ions & Isotopes Practice
Determine the number of protons, electrons, & neutrons for the following: Use your periodic table to help you. Label each arrow before you begin.
|Ion/Isotope/Both |Protons (p+) |Electrons (e-) |Neutrons (n0) |
|79Se -2 | | | |
|34 | | | |
|45Sc +3 | | | |
|21 | | | |
|13C -4 | | | |
|6 | | | |
|91Zr+4 | | | |
|40 | | | |
|104Ce +3 | | | |
|58 | | | |
|14C | | | |
|6 | | | |
|40Ca+2 | | | |
|20 | | | |
|36Cl-1 | | | |
|17 | | | |
|34S | | | |
|16 | | | |
|27Al+3 | | | |
|13 | | | |
Counting Atoms Practice
Complete the table below: The first one has been done for you as an example.
|Formula |List of atoms (elements) in the compound |# of each kind of atom |Total # of atoms |
|MgBr2 |Mg |1 |3 |
| |Br |2 | |
| | | | |
| | | | |
|Na3PO4 | | | |
| | | | |
| | | | |
| | | | |
|CO2 | | | |
| | | | |
| | | | |
| | | | |
|NH4Cl | | | |
| | | | |
| | | | |
| | | | |
|C6H12O6 | | | |
| | | | |
| | | | |
| | | | |
|(NH4)3PO4 | | | |
| | | | |
| | | | |
| | | | |
|Mg(OH)2 | | | |
| | | | |
| | | | |
| | | | |
|Ba3(PO4)2 | | | |
| | | | |
| | | | |
| | | | |
Classifying Chemical Reactions Practice
Classify the reactions as synthesis, decomposition, single displacement, double displacement, or combustion. Put a star next to the Acid-Base reaction for one bonus point.
|1.) 2 H2 + O2 ( 2 H2O | |
|2.) 2 H2O ( 2 H2 + O2 | |
|3.) Zn + H2SO4 ( ZnSO4 + H2 | |
|4.) 2 CO + O2 ( 2 CO2 | |
|5.) 2 HgO ( 2 Hg + O2 | |
|6.) 2KBr + Cl2 ( 2 KCl + Br2 | |
|7.) CaO + H2O ( Ca(OH)2 | |
|8.) AgNO3 + NaCl ( AgCl + NaNO3 | |
|9.) 2 H2O2 ( 2 H2O + O2 | |
|10.) Ca(OH)2 + H2SO4 ( CaSO4 + 2 H2O | |
|11.) 2 C4H10 + 13 O2 ( 8 CO2 + 10 H2O | |
|12.) 2 KClO3 ( 2 KCl + 3 O2 | |
|13.) HCl + NaOH ( NaCl + H2O | |
|14.) Mg + 2 HCl ( MgCl2 + H2 | |
|15.) 2 Al + 3 NiBr2 ( 2 AlBr3 + 3 Ni | |
|16.) 4 Al + 3 O2 ( 2 Al2O3 | |
|17.) 2 NaCl ( 2 Na + Cl2 | |
|18.) CaCl2 + F2 ( CaF2 + Cl2 | |
|19.) AgNO3 + KCl ( AgCl + KNO3 | |
|20.) N2 + 3 H2 ( 2 NH3 | |
|21.) 2 C6H14 + 19 O2 ( 12 CO2 + 14 H2O | |
|22.) (NH4)2SO4 + Ba(NO3)2 ( BaSO4 + 2 NH4NO3 | |
|23.) MgI2 + Br2 ( MgBr2 + I2 | |
|24.) SO3 + H2O ( H2SO4 | |
|25.) 6 KCl + Zn3(PO4)2 ( 3 ZnCl2 + 2 K3PO4 | |
-----------------------
79Se -2
34
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