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Science: Chemistry Facts

Dioxygen (O2) and ____ (O3) are allotropes of oxygen. dry ice
Mixing HCl and NaOH produces ____ (table salt) and water. fluoride
When some metals react with acids, ____ gas is released. graphite
To dilute an acidic solution, slowly add it to ____ while stirring. hydrogen
A ____ anion has a charge of -3. NaCl
The core of a pencil contains ____ (made of carbon not lead). ozone
Sodium ____ is added to toothpaste to harden tooth enamel. phosphate
The solid form of carbon dioxide (CO2) is ____. water