Chemistry Lessons 2.1 and 2.2 Retake Part 1

Mendeleev

• Arranged the Periodic Table based on Increasing atomic mass

• Arranged the Periodic Table based on Increasing atomic Number

The _______ is the Number of Protons

• Atomic number

• Atomic Mass

_______ on the periodic table are called groups or families

• Columns

• Flows

______ on the periodic table are called periods

• Flows

• Columns

Columns on the periodic table are called,

• Groups/Families

• Periods

What is an Example of a Noble Gas Shortcut configuration for Nitrogen?

• [He] 2s2 2p3

• [N] 1s2 2s2 2p3

Why when we write, [He] 2s2 2p3 for Nitrogen, we put Helium in brackets?

• Because it has the same atomic number and atomic mass that corresponds with each other.

• When Finding a Shortcut for Noble Gas shortcut configuration, we look above the element we are writing about and go all the way to the left on the periodic table.

Why when we write, [He] 2s2 2p3 for Nitrogen, we continue [He] with 2s2 2p3?

• We take away 1s2 from both Nitrogen and Helium leaving 2s2 and 2p3 in its place

• When using a noble gas shortcut, we skip count to the element on the periodic table depending on the protons.

How do we write the noble gas shortcut configuration for Phosphorus?

• [Ne] 3s2 3p3

• 1s2 2s2 2p6

Why when we write the noble gas shortcut for Phosphorus we write it in, 3s2 3p3 after we put brackets for [Ne]?

• We skip the first two numbers and leave the last segment of numbers

• We start off from the first line on which the element is on, and write down the numbers based on their atomic mass and Number.