Periodic Table

4. What are the vertical columns of elements in a periodic table called?
6. who arranged the elements in a table by order of atomic number instead of atomic mass?
8. what is the gas located in group 0, period 1?
9. the nonmetals in group 7A are called the ________.
12. the lanthanide and actinide series are apart of the ______ transition metals.
13. Group 1A elements are called the ______ metals.
14. The elements in group 2A are called _______ earth metals.
15. What are the horizontal rows of the periodic table called?
16. what are poor conductors of electricity ands are generally non lustrous?
19. what is shiny and have a high electrical conductivity
20. The nonmetals in group 0 are known as the ___________.

1. who listed the elements in columns in order of increasing atomic mass?
2. Group A elements are called the _______ elements.
3. what is the nonmetal located in group 3A, period 2.
5. what is an arrangement of the elements according to similarities in their properties?
7. the elements, copper, gold, iron, and mercury, are all located in what group?
10. The periodic table are elements that are organized in groups and periods in order of _________ atomic number.
11. what are elements with properties that are intermediate between those of metals and nonmetals?
17. what is the total number of protons and neutrons in an atom called?
18. what is the metal located in group 1A, period 4?