PERIODIC TABLE OF ELEMENTS

The horizontal rows on the periodic table are called

• groups

• periods

• families

• atomic numbers

The symbol of the element Sodium is

• S

• Si

• Na

• Se

Mendeleev arranged the elements by their

• alphabetical

• melting point

• density

• atomic number

These are formed in the periodical table

• compounds

• mixtures

• elements

Sodium (Na) is found in group

• 1

• 2

• 3

• 4

Each vertical column in the periodic table is called

• period

• cluster

• groups

• unit

Periods on the periodic table are

• horizontal rows

• vertical columns

Sodium (Na) is found in period

• 3

• 2

• 4

• 1

What element can be used in making jewelries

• Au

• Al

• Ni

• He

The number 6 in the picture represents

• chemical symbol

• atomic mass

• atomic number

• symbol