Periodic Table Concepts and Elements

The video tutorial explains the structure of the periodic table, focusing on periods and groups. It details how periods are horizontal rows and groups are vertical columns, with a total of seven periods and 18 groups. The tutorial discusses the arrangement of elements by atomic number, not atomic mass, and explains the concept of valence electrons. It also provides examples of drawing Bohr models for elements like lithium and magnesium.

How many periods and groups are there on the periodic table?

• 18 periods and 18 groups

• 7 periods and 7 groups

• 18 periods and 7 groups

• 7 periods and 18 groups

Which elements are found in period 1 of the periodic table?

• Hydrogen and Helium

• Lithium and Beryllium

• Sodium and Argon

• Potassium and Calcium

What is the main criterion for arranging elements in the periodic table?

• Alphabetical order

• Increasing atomic mass

• Increasing atomic number

• Decreasing atomic mass

Which element has an atomic mass of 58.993?

• Manganese

• Nickel

• Cobalt

• Iron

Which group contains the element Francium?

• Group 18

• Group 13

• Group 2

• Group 1

In which group is Oxygen found?

• Group 14

• Group 16

• Group 15

• Group 17

Which element is found at the start of group 18?

• Helium

• Neon

• Argon

• Krypton

How many valence electrons does Carbon have?

• 6

• 2

• 4

• 8

How many electron shells does Lithium have?

• 4

• 3

• 2

• 1

What is the maximum number of electrons the first ring can hold in a Bohr model?

• 4

• 3

• 2

• 1