Question

1. vertical columns on the periodic table are called
2. horizontal rows on the periodic table are called
3. the number of protons in an atom is that element’s number.
4. the number of protons and neutrons in an atom is that atom’s number.
5. the elements in groups 3 through 12 are called the
6. the elements in group 1 are called the
7. the elements in group 2 are called the
8. the elements in group 18 are called the
9. the elements in group 17 are called the
10. the elements in group are the most reactive metals.
11. the elements in group are the most reactive nonmetals
12. the elements in group are very unreactive.
13. the ability of a material to be drawn into a thin wire is called
14. the ability of a material to pound into thin sheets is called

Explanation:

1. In the periodic table, vertical columns are known as groups or families.
2. Horizontal rows are called periods.
3. The number of protons in an atom defines its atomic number.
4. The sum of protons and neutrons gives the mass number.
5. Elements in groups 3 - 12 are transition metals.
6. Group 1 elements are alkali metals.
7. Group 2 elements are alkaline - earth metals.
8. Group 18 elements are noble gases.
9. Group 17 elements are halogens.
10. Group 1 elements are the most reactive metals.
11. Group 17 elements are the most reactive non - metals.
12. Group 18 elements are very unreactive.
13. Drawing a material into a thin wire is called ductility.
14. Pounding a material into thin sheets is called malleability.

Answer:

1. Groups
2. Periods
3. Atomic
4. Mass
5. Transition metals
6. Alkali metals
7. Alkaline - earth metals
8. Noble gases
9. Halogens
10. 1
11. 17
12. 18
13. Ductility
14. Malleability