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Elements Compounds Mixtures
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If a substance cannot be separated or broken down into simpler substances by chemical means is a what...
element
What are the 3 particles that make-up the atom?
protons, neutrons, and electrons
These particles orbit around the nucleus of an atom. What are they called?
Electrons
What 2 particles are found in an atoms neucleus?
Protons and neutrons
Particles in an atom that are neutral and have no charge are
Neutrons
The positive particles of an atom are
Protons
How many electrons in an oxygen atom?
8
True or False: only living things are made of atoms
False - All things are made of atoms
Two hydrogen atoms and one oxygen atom stuck together creates what molecule?
Water (H2O)
Pizza is an example of a
mixture
The chemical symbol for .................. is Au.
Gold
The chemical symbol for .................. is Pb.
Lead
The chemical symbol for .................. is O.
Oxygen
Can compounds be easily separated?
No.
Magnesium and _____(how many) Sulfur = Magnesium sulfide (MgS)
One (1)
Formulas show which elements from the periodic table are combined
True
Sodium is all over Earth. Its easy to find in its pure form.
False - is never naturally found in its pure form
Lithium is the lightest of all the metals. It can float on water
True
True or False? Chlorine gas was used as a chemical weapon during World War 1.
True
True or False? When burned, sodium will produce a yellow flame.
True
True or False? Sodium is soft enough to cut with a butter knife at room temperature.
True
The chemical symbol for .................. is Na.
Sodium
What is the formula/symbol for Carbon Dioxide
CO2
What is the symbol/formula for Carbon Monoxide?
CO
Compound or Mixture?
Mixture
Compound or Mixture?
compound
Different elements or compounds that are not joined together chemically.
Mixture
Element or Compound?
Compound
Element with the smallest mass in the Periodic Table.
Hydrogen
Element or Compound?
Compound
Substance that are made up more than one kind of atom.
Compound
Most common element found in the Universe.
Hydrogen
Most common metal found in the Earth's crust.
Aluminium
The chemical symbol for .................. is C.
carbon
A molecule of oxygen is made from ............. atoms of oxygen joined together.
Two(2)
Group of atoms joined tightly together.
Molecule
A substance that is made of just one kind of atom.
Element
Have many different types of atoms have been made in laboratories?
24
What is the building block of all matter?
Atoms
Baking soda is an example of what?
Compound
Aluminum is an example of what?
Element
Table salt is an example of what?
Compound
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