Protons & Neutrons
What is atomic number and electrons
What is Na
These two molecules make up water
What is hydrogen and oxygen
How acidic or basic something is
Burning wood is an example of
What is a chemical change
You find neutrons by using this
What is atomic mass minus the number of protons
The chemical symbol for helium is
He
The chemical formula for water is H20, how many hydrogens are in the formula?
What is 2 hydrogens
What number identifies something as acidic?
0-6
Melting ice is an example of
What is 82 protons
The formula for table salt is NaCl, how many atoms are in this formula
What is 2 atoms
Water is considered a universal solvent because
It can dissolve many different substances to make solutions.
Number 7 on the pH scale identifies substances that are
What is neutral
Physical change does not change the properties of a substance
True
If an atom has 24 protons and 24 electrons, what is the atomic number of this element?
What is a atomic number of 24
All chemical reactions have reactants and products, true or false
True
This type of bond occurs between two water molecules
What is a hydrogen bond
What is basic
This is a chemical reaction that forms new products
What is a chemical change
What is a negative charge
ions are known as
Charged atoms
Water is a polar molecule which means...
On the pH scale the number 14 means you have a
What is a strong base
Chopping wood is an example of what
Physical change