Question

complete the paragraph below using the terms listed to the left. a substance that cannot be broken down into other substances is a(n) _. carbon - 14 is a(n) _. it has a different number of neutrons than other carbon atoms. a(n) _ forms when two or more elements combine. the chemical bond that holds the elements together is a(n) _ when electrons are shared. a substance with this kind of bond is called a(n) _. an atom that has lost or gained one or more electrons becomes a(n) _ which carries an electric charge. two of these oppositely charged atoms can form an electrical attraction called a(n) _. an attraction between oppositely charged regions of molecules is called a(n) _. van der waals force, molecule, isotope, ionic bond, ion, element, covalent bond, compound

Explanation:

1. A substance that cannot be broken down into other substances is an element.
2. Carbon - 14 has a different number of neutrons than other carbon atoms, so it is an isotope.
3. When two or more elements combine, a compound is formed.
4. A chemical bond that holds elements together when electrons are shared is a covalent bond.
5. An atom that has lost or gained one or more electrons becomes an ion.
6. A kind of bond where one atom donates electrons to another (oppositely - charged atoms attracting) is an ionic bond.
7. Attraction between oppositely charged regions of molecules is van der Waals force.
8. Atoms with an electric charge are ions, and the attraction between oppositely charged atoms can form an electrical attraction called an ionic bond.

Answer:

1. element
2. isotope
3. compound
4. covalent bond
5. ion
6. ionic bond
7. van der Waals force
8. ionic bond