electron shells

Question 1

how many electrons are allowed in the first shell?

Answer 1

2

Question 2

how many electrons are allowed in the rest of the shells?

Answer 2

8

Question 3

is the atomic number the big number or small number on the periodic table?

Answer 3

small number (bottom number)

Question 4

what does the atomic number tell you about an element?

Answer 4

the number of protons, and therefore the number of electrons (number of electrons and protons are the same)

Question 5

how can you work out the electronic configuration of an element from its period and group?

Answer 5

. The number of shells which contain electrons is the same as the period of an element.
. The group number tells you how many electrons occupy the outer shell of the element.

Question 6

are the periods in a periodic table the rows down or across the elements

Answer 6

the rows of elements going across the table