Elements
What do the colors on the Periodic Table show
whether the element is a solid, a liquid, or a gas at room temperature
Oxygen
what is the ocean mostly made out of
When scientists see the letters “Au,” they know it means “gold.” What is Au?
the element symbol
All the elements that have been discovered
What can you find on the Periodic Table?
CO2
What is the Formula for Carbon Dioxide
what makes everything
atoms
it conducts heat and electricity
Which of the following is characteristic of a metal?
Water
What are living things mostly made out of
the number of atoms of a particular element that are in a compound
What does a subscript tell you?
H2O
what is the formula for water
Democritus
Who came up with atoms
What is the earth's crust mostly made out of
Oxygen
because it is a compound
Why isn’t water on the Periodic Table?
a chemical reaction
What needs to occur in order for elements to form a compound?
its a expression of the types of numbers and atoms in a substance
What is a formula?
a chart that shows all the elements scientists have discovered
What is the Periodic table
Nitrogen
what is the 4th most thing living things have in them
Waft
What do you do when you need to smell a chemical
118
How many elements are there on the Periodic Table
matter made of the same type of atoms also refered to as a pure substance
An element is defined as
the number of protons in an element
What does an element's atomic number represent?
Nitrogen
What is earth's atmosphere mostly made out of
It helps them find information quickly.
How is the Periodic Table helpful to scientists?
AL2 O3
If a compound has 2 atoms of aluminum (Al) and 3 atoms of oxygen (O), what would its chemical formula look like?
Compounds
What is formed when 2 or more atoms from different elements come together