# Worksheet 1A: Atoms, Ions, and Naming Compounds


## 1. Fill in the following table

 Symbol $$\ce{^{52}Cr}$$ Protons 25 82 Neutrons 30 64 Electrons 48 86 Mass No. 222 207

## 2. Fill in the following table

 Symbol $$\ce{^{59}Co^{3+}}$$ Protons 34 76 80 Neutrons 46 116 120 Electrons 36 78 Charge 2+

## 3. Predict the charge of the most stable ion of each atom

1. $$Mg$$
2. $$Al$$
3. $$K$$
4. $$S$$
5. $$F$$
6. $$Sr$$
7. $$Sc$$
8. $$P$$
9. $$I$$
10. $$Se$$

## 4. Predict the chemical formula and name for the ionic compound formed by the following

1. $$Ca$$ and $$Br$$
2. $$K$$ and $$CO$$
3. $$Al$$ and $$C_2H_3O_2$$
4. $$NH_4$$ and $$SO_4$$
5. $$Mg$$ and $$PO_4$$
6. $$Cu^+$$ and $$S$$
7. $$Fe^{3+}$$ and $$O$$
8. $$Hg^{2+}$$ and $$CO_3$$
9. $$Ca$$ and $$CO_3$$

## 5.Predict if the following compounds are ionic or molecular, then name appropriately

1. $$B_2H_6$$
2. $$CH_3OH$$
3. $$LiNO_3$$
4. $$Sc_2O_3$$
5. $$CsBr$$
6. $$NOCl$$
7. $$NF_3$$
8. $$Ag_2SO_4$$
9. $$PF_5$$
10. $$NaI$$
11. $$SCl_2$$
12. $$Ca(NO_3)_2$$
13. $$FeCl_3$$
14. $$LaP$$
15. $$CoCO_3$$
16. $$N_2O_4$$

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