Question

Match the following words to their descriptions.

Column A
1.
the smallest unit of matter:
2.
two atoms held together by an ionic bond:
3.
two atoms held together by a covalent bond:
4.
Si
5.
NaCl
6.
CO2

Answer 1

Here are the matches between the words in Column A and their descriptions:

1. **the smallest unit of matter:** Atom
2. **two atoms held together by an ionic bond:** NaCl
3. **two atoms held together by a covalent bond:** CO2
4. **Si:** Silicon (a chemical element)
5. **NaCl:** Sodium Chloride (table salt, formed by ionic bond)
6. **CO2:** Carbon Dioxide (formed by covalent bonds)

So here is the final matching:

1. Atom
2. NaCl
3. CO2
4. Silicon (Si)
5. Sodium Chloride (NaCl)
6. Carbon Dioxide (CO2)