Periodic table

Question 1

How many periods and groups does the periodic table have?

Answer 1

p= 7

g=8

Question 2

who made the 1 st proper periodic table?

Answer 2

Dmitri Mendeleev

Question 3

Electronic configuration steps

Answer 3

1. Period/row num-shells
2. Group/column num-electrons in outer shell
3. • to atomic number

Question 4

Name the groups in periodic table?

Answer 4

1,2-reactive metals
3,4,6,7-non metals
0-noble gases

Question 5

How did Dmitiri Mendeleev arrange the first table?

Answer 5

It was arranged by mass number
he realised chemical/physical properties of element related to atomic mass so arranged them so groups of elements with similar properties fell into vertical columns in table