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6. What is an alkali metal?
- Metals that are non-reactive and have 2 outer electrons in their shell
- Metals that are soft, reactive and have 1 outer electron in their shell
- Metals that are non-reactive and have no outer electrons in their shell
7. What is the atomic number of an atom?
- The amount of electrons in an atom
- The amount of protons in an atom
- The amount of neutrons in an atom
8. What is an isotope?
- An element
- Different forms of the same element that have the same number of protons but a different number of neutrons
- Different forms of the same element that have the same number of neutrons but a different number of protons
9. What is the equation for relative atomic mass (Ar)?
- Ar = atomic number - mass number
- Ar = sum of (isotope abundance x isotope mass number) ÷ sum of abundance of all the isotopes
- Ar = mass number + atomic number
10. What are Group 1 elements also known as?
- Alkali metals
- Halogens
- Transition metals
11. What are Group 7 elements also known as?
- Noble gases
- Halogens
- Alkali metals