Elements
What symbol does the element helium have on the periodic table.
Symbol: He
What is it called when a solid turns into a liquid?
Melting
Name the 4 states of matter.
Solid, liquid, gas, plasma
What kiind of reaction is this: 2Na + Cl2 → 2NaCl
Synthesis Reaction
What is the definition of insoluble?
Unable to dissolve
On a bohr model, how do you get the electrons?
P-N=E
What is it called when a gas turns into a liquid?
Condensing
How does a solid move?
Vibrates quickly
What kind of reaction is this: Ch4 + O2 = CO2
Combustion Reaction
What does a catalyst do in a reaction?
Speeds up a reaction
What symbol does the element iron have on the periodic table.
Symbol: Fe
What is it called when a gas turns into a solid?
Deposition
What is the least common state of matter in the universe?
Liquid
What kind of reaction is this: 2K + 2H2O → 2KOH + H
Single Replacement
When one or more substances are changed into new substances is called this.
A chemical reaction
What element has the symbol As.
Arsenic
What is it called when a solid turns right into a gas.
Sublimation
What is the most common state of matter in the universe?
Plasma
What kind of reaction is this: AB + CD = AD + BC
Double Replacement
When the number of atoms is equal on each side we say that the equation is this.
Balanced
What element has the symbol Hg.
Mercury
Give at least one example of sublimation.
Dry Ice
What is the least common state of matter on earth?
Plasma
What kind or reaction is this: AB → A + B
Decomposition Reaction
Can be used to describe either an element or a compound.
A substance.