the history of the modern periodic table 5

Question 1

the periodic table consists of several horizontal rows called the

Answer 1

periods or series

Question 2

There are _ periods which are designated as ______________

Answer 2

7
1,2,3,4,5,6 and 7

Question 3

has two elements (hydrogen and helium) corresponding to the number of electrons in the s- sublevel having their electrons occupying only one main energy level.

Answer 3

Period 1

Question 4

each has eight elements corresponding to the eight electrons in the s and p block.

Answer 4

Periods 2 and 3

Question 5

Periods 4 and 5 each has eighteen elements corresponding to the electrons in the s, p and d sublevels

Question 6

called the inner transition elements.

Answer 6

the last two periods

Question 7

The lanthanide series is then called the

Answer 7

rare- earth elements and the actinide series, the heavy rare earth elements.

Question 8

has 32 elements corresponding to the 32 electrons in the s, p, d, and f sublevels. To make this period fit the 18-member maximum arrangement of elements, the 14 elements from atomic numbers 58 to 71 are removed and placed at the bottom of the table to form the lanthanide series.

Answer 8

• Period 6

Question 8

also includes 14 elements (from atomic number 90 through 103) which were placed at the bottom part of the table to form the actinide series.

Answer 8

Period 7