The chemical symbol for .................. is Cl.
Chlorine
The chemical symbol for .................. is C.
Carbon
When you read each row across the Periodic Table, from left to right, the mass of the atoms ........................ (increase/decrease).
Increase
H2O is a/an (compound, molecule, element)
Compound
The chemical symbol for .................. is O.
Oxygen
Substance that is made of just one kind of atom.
Element
What is the formula of Carbon Dioxide?
CO2
Element or Compound? GOLD Au
Element
The person behind the modern periodic table.
Dmitri Mendeleev
How many Elements we currently have?
118
The chemical symbol for .................. is Na.
Sodium
"Building block" of all matter that surround us.
Atom
Salt, NaCl (element/molecule/compound)
Compound
A molecule of oxygen is made from ............. atoms of oxygen joined together.
Two
The rows in the Periodic Table are called...
Periods
Give 2 example of Metal element.(pure substance)
Gold, Silver, Iron . . .
A molecule that are made up more than one kind of atom.
Compound
Group of atoms joined tightly together. Like Ozone
Molecule
The columns in the Periodic Table are called..
Groups
The chemical symbol for .................. is Fe.
Iron
How to get the molecular mass
Combine all the mass of each atom in the molecule