Symbols
Families
Trends
Atomic #
Challenge
100

Na

What is Sodium?

100

Noble Gases

What is Group 18?

100

Across a period, atomic radius generally... 

What is decreases?

100
Atomic number of 6

What is Carbon?

100

Name one metalloid

What is Silicon, Boron, Germanium? 

200

Iron

What is Fe?

200

Halogens

What is Group 17?

200

Higher Electronegativity: O or S

What is Oxygen?

200

Atomic number of 8

What is Oxygen?

200

Valence Electrons of Group 16

What is 6? 

300

Symbol for Potassium

What is K?

300

Alkali Metals

What is Group 1?

300

Larger Radius: Na or Cl

What is Sodium?

300

Atomic number of Neon

What is 10?

300
A period 3 metalloid

Silicon

400

Symbol for Ag

What is Silver?

400

Alkaline Earth Metals

What is Group 2?

400

Higher Ionization Energy: Mg or P

What is Phosphorus?

400

Element with atomic number 17

What is Chlorine?

400

Element in group 2 period 4

What is Calcium? 

500

Lead

What is Pb?

500

Groups 3 - 12

What are transition metals?

500

Most reactive nonmetal family

What is Halogens?

500

Element with atomic number 26

What is Iron?

500

element ending in electron configuration 3p5

What is Chlorine?