Periodic table practice 2

How many valence electrons does Silicon (Si) have?

• 8

• 4

• 3

• 7

Which element has 6 valence electrons?

• Neon (Ne)

• Potassium (K)

• Sulfur (S)

• Aluminum (Al)

Which groups are HIGHLY reactive w/ other elements?

• Groups 1 & 17

• Groups 1 & 18

• Groups 10 & 5

• Groups 17 & 18

Elements are organized by REACTIVITY into.....

• Periods

• Groups

Elements that appear horizontally on the periodic table

• Periods

• Groups

Elements that are similar in chemical reactivity

• Periods

• Groups

Appear Vertically on the periodic table

• Periods

• Groups

Rows on the period table are called _____ while columns are called _____.

• groups, families
• groups, periods
• periods, groups
• families, groups

Describe this element.

• Highly reactive metal
• Highly reactive nonmetal
• Stable
• Less stable non metal

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell