Show:
Atoms
molecules
chemical reactions
physical properties
periodic table
100
H
What is hydrogen
100
water
What is 2 Hydrogen atoms and an Oxygen atom?
100
When two or more elements or molecules combine to make something new.
What is a chemical reaction?
100
When a liquid changes to a gas.
What is vaporization (evaporation)
100
The periodic table contains these
What are elements?
200
The number of protons
What is the atomic number of an element?
200
Molecules are made of these
What is two or more atoms?
200
Bubbles indicate this
What is the production of a gas?
200
When a solid changes to a liquid.
What is melting?
200
Metals are found here
What is the right side?
300
-1
What is the charge of an electron?
300
This has different properties that what it is made from.
What is a molecule?
300
Water
What is 2 Hydrogen + Oxygen
300
Color, size, melting point.
What are physical properties?
300
All elements want to be this.
What is a noble gas?
400
atomic mass number
What is the number of protons and neutrons in the nucleus?
400
Two atoms of the same type combined together.
What is a diatomic molecule (noble gas)?
400
July 4th celebrations use this kind of chemical reaction
What is combustion reaction? fireworks
400
When a solid turns directly to a gas.
What is sublimation?
400
The father of the Periodic table
Who is Mendeleev?
500
Atom
What is the smallest unit that is still the element?
500
These are two or more atoms or molecules combined.
What is a compound?
500
The type of reaction that takes in heat.
What is an endothermic reaction?
500
When a gas turns directly to a solid.
What is deposition?
500
The atoms are placed in this order on the periodic table?
What is by increasing atomic number?