IPC Unit 2-2: Electron Dot Diagrams and Bohr Models CFA

Which number of dots in an electron dot diagram indicates a stable atom?

• 2
• 4
• 6
• 8

Why do sodium and potassium have the same number of dots in their electron dot diagrams?

• They have the same number of protons
• They have the same number of neutrons
• They have the same number of valence electrons
• They are in the same group on the periodic table

Which elements will have similar electron dot diagrams to fluorine?

• Neon and Chlorine
• Lithium and Beryllium
• Chlorine and Bromine
• Oxygen and Sulfur

What group of elements will readily form bonds with the elements that have similar electron dot diagrams to fluorine?

• Group 1 (alkali metals)
• Group 2 (alkaline earth metals)
• Group 17 (halogens)
• Group 18 (noble gases)

How many protons are in the nucleus of a nitrogen atom?

• 5
• 7
• 14
• 28

How many neutrons are in the nucleus of an oxygen atom?

• 8
• 10
• 16
• 18

How many electrons are in a calcium atom?

• 20
• 40
• 48
• 80

How many energy levels are shown in the Bohr model for a neon atom?

• 1
• 2
• 3
• 4

How many valence electrons are shown in the Bohr model for a magnesium atom?

• 1
• 2
• 3
• 8

How many protons are in the nucleus of a boron atom?

• 5
• 6
• 11
• 20