Holati qattiq bo‘lgan quyidagi moddalarning kristall panjara turini toping.
1) CO₂; 2) SiO₂; 3) NaKCO₃; 4) H₃PO₄;
a) atom; b) ion; c) molekulyar; d) metall.

1. a–2,4; b–3; c–1
2. a–2; b–3; c–1,4; d–3
3. a–2; b–3; c–1,4
4. a–2,4; b–3; c–1; d–3