Periodic Traits

Question 1

What is Metal Reactivity of Alkali Metals?

Answer 1

Low melting point, low density, easy to cut, highly reactive in water

Question 2

What is Metal Reactivity of Alkali Earth Metals?

Answer 2

Nearly as reactive as Alkali Earth Metals; harder and higher melting points

Question 3

What is Metal Reactivity of Transitional Metals?

Answer 3

Very hard, high densities; much less reactive in water than other metals. Suitable for resistant products

Question 4

What are Periodic Trends of Metal Reactivity?

Answer 4

• Period Reactivity: Decreases from Left -> Right
• Group Reactivity: Increases from Up -> Down

Question 5

What is Nonmetal Reactivity of Groups 14 and 15?

Answer 5

Not very reactive although it can form chemical bonds

Question 6

What is Nonmetal Reactivity of Groups 16 and 17?

Answer 6

• Group 16: More reactivity than groups 14-15
• Group 17 (Halogens): Most reactive nonmetals

Question 7

What is Nometal Reactivity of Group 18 (Noble Gases)?

Answer 7

• Colorless, odorless, and inert (least reactive)
• Most stable of nonmetals

Question 8

How do Periods relate to Electron Energy Level?

Answer 8

Decreasing periods have higher energy levels

Question 9

How do Groups relate to Valence Electron levels?

Answer 9

Every atom in a group has the same # of Valence Electrons

Question 10

What is Atomic and Ionic radius?

Answer 10

• Atomic Radius: Distance from nucleus to outermost electrons (in a Neutral Atom)
• Ionic Radius: Distance from nucleus to outermost electrons (in an Ion)

Question 11

What is Electronegativity?

Answer 11

Tendency of an atom to attract electrons

Question 12

What is Ionization Energy? What is the Shielding Effect?

Answer 12

• Ionization Energy: energy required to remove one valence electron from a neutral atom, forming a Positive Ion
• Shielding Effect: Further Valence Electrons = less impact on inner electrons