Question

1. ……………. have definite shape and definite volume.

2. ……………. was the first scientist to use symbols for atoms.

3. ……………. is a acidic radical.

4. ……………. is a acidic oxide.

5. Radioactive isotope of a carbon is …………….​

Answer 1

1. Solid

2. John Dalton

3. Negatively charged radical