Question

1. neon - 20 and neon - 22 are called ____________.15. is the following sentence true or false? isotopes are chemically alike because they have identical numbers of protons and electrons.________________match the designation of each hydrogen isotope with its commonly used name.__16. hydrogen - 1 a. tritium__17. hydrogen - 2 b. hydrogen____18. hydrogen - 3 c. deuterium

Explanation:

• For question 14: Isotopes are atoms of the same element with different mass numbers. Neon - 20 and neon - 22 have the same atomic number (proton number) but different mass numbers, so they are isotopes.
• For question 15: Chemical properties of an element are mainly determined by the number of electrons (and protons as the number of electrons equals the number of protons in a neutral atom). Isotopes have the same number of protons and electrons, so they are chemically alike.
• For question 16 - 18: Hydrogen - 1 is the most common form of hydrogen. Hydrogen - 2 is called deuterium. Hydrogen - 3 is called tritium.

Answer:

1. isotopes
2. True
3. b. hydrogen
4. c. deuterium
5. a. tritium