Molecules/compunds
Elements letters (Na=sodium)
Properties
Melting points
Challenge worth double
100

H2O

Waterrrrrr

100

H

Hydrogen

100

Soft, valuable, metal

Gold

100

Water

0°C (32°F)
100

What is tree bark mostly made out of

Carbon

200

NaCl

Table salt

200

He

Helium

200

What happens to steel under heat

It expands

200

Gold

1,948°F/ 1,064°C

200

What two elements are most common in space

Hydrogen and helium

300

SiO2

Amethyst

300

Cu

Copper

300

What two byproducts does lithium make when put in water (hint: it is an alkali metal) 

Lithium hydroxide, and hydrogen gas

300

Glass

approximately 1400 C to 1600 C

300

Four most important elements for life

Carbon, hydrogen, oxygen, nitrogen

400

SiO2

Quartz

400

Sn

Tin

400

Platinum

3,215°F/ 1,768°C

500

C₆H₁₂O₆

Glucose

500

Ag 

Silver

500

Plastic

No definite melting point