Understanding Valence electrons

What are the electrons in the outermost shell of an atom called?

• Protons

• Neutrons

• Inner electrons

• Valence electrons

What pattern do we observe in the number of valence electrons across a period on the periodic table?

• The number of valence electrons decreases from left to right across a period.

• The number of valence electrons increases from left to right across a period.

• The number of valence electrons is the same across a period.

• The number of valence electrons is random across a period.

Which group on the periodic table contains elements with one valence electron?

• Group 2

• Group 13

• Group 18

• Group 1

How many valence electrons do elements in Group 15 have?

• 5

• 3

• 4

• 6

Elements in the same group have similar chemical properties because:

• They have similar valence electron configurations.

• They have similar atomic weights.

• They have the same number of protons.

• They share identical electron shells.

How many valence electrons do elements in Group 18 typically have, except for helium?

• 6

• 8

• 7

• 9

What is unique about helium's valence electrons compared to other elements in Group 18?

• Helium has 8 valence electrons.

• Helium has 2 valence electrons.

• Helium has 4 valence electrons.

• Helium has 6 valence electrons.

How many valence electrons do elements in Group 13 have?

• 2

• 4

• 5

• 3

What pattern do we observe in the number of valence electrons going down a group on the periodic table?

• The number of valence electrons increases going down a group.

• The number of valence electrons decreases going down a group.

• The number of valence electrons remains the same going down a group.

• The number of valence electrons is random going down a group.

How many valence electrons do elements in Group 17 have?

• 5

• 6

• 7

• 8