The Periodic Table

Question 1

When did Mendeleev publish his first periodic table of elements?

Answer 1

1869

Question 2

What did Mendeleev arrange the elements in?

Answer 2

Relative atomic mass and then those with similar properties

Question 3

What did Mendeleev do to classify his work?

Answer 3

-left gaps for undiscovered elements
-switched the order of a few elements to keep the groups consistent

Question 4

How are the elements arranged in the modern periodic table?

Answer 4

Atomic number

Question 5

What are rows called?

Answer 5

Periods

Question 6

What are vertical columns called?

Answer 6

Groups

Question 7

What is electronic configuration?

Answer 7

The way in which electrons are arranged in an atom

Question 8

Give the links of electronic configuration of an element to its position on the periodic table

Answer 8

-number of shells is the period number that element is situated in
-number of electrons in outer shell=group number
-total number of electrons in all shells=atomic number

Question 9

Why do the elements in the same group have similar chemical properties?

Answer 9

They have the same number of electrons in their outer shell