Question

1. match the descriptions with the terms. found in the top row of the inner transition series, these are sometimes called rare metals. these are atoms chemically joined together. created artificially by scientists in a laboratory, these may or may not include carbon. these communicate the quantity of protons found in elements. this electrical force holds atoms tightly together in a molecule.

Explanation:

1. Lanthanides are in the top - row of the inner transition series and sometimes called rare earth metals.
2. Molecules are atoms chemically joined together.
3. Synthetic compounds are created artificially in a laboratory and may or may not contain carbon.
4. Atomic numbers communicate the quantity of protons in elements.
5. Chemical bonds (electrical forces) hold atoms tightly together in a molecule.

Answer:

1. Lanthanides
2. Molecules
3. Synthetic compounds
4. Atomic numbers
5. Chemical bonds