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WorksheetsElements, Compounds and Experimental Techniques
Total questions: 11
Worksheet time: 7mins
A Solution consisting of a Soluble Solid and a particular Solvent can be separated by:
Simple Distillation.
Fractional Distillation.
Evaporation.
Centrifuging.
What was the name of the Scientist responsible for defining Atoms?
John Dalton.
Robert Boyle.
What was the name of the Scientist responsible for defining Elements?
Robert Boyle.
John Dalton.
What is the relationship between molecules and atoms?
Molecules are combinations of two or more atoms.
Molecules are the parts that make up atoms
Molecules are the gaseous parts of atoms
Molecules are atoms that have a positive charge
Mixtures are different than pure substances because mixtures-
have lower boiling points
can be separated physically
are less dense than pure substances
contain only one type of atom
Which of the following is true of oxygen?
Oxygen is an element because its most basic unit is a single type of atom
Oxygen is a compound because its most basic unit is a single type of atom.
Oxygen is a mixture because its most basic unit contains more than one particle.
Oxygen is a compound because its most basic unit contains more than one type of particle.
Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is
an element made of carbon and oxygen atoms.
a solution made of carbon and oxygen atoms.
a compound of carbon and oxygen atoms.
a mixture of carbon and oxygen atoms.
Sam's mother is cooking breakfast in a cast-iron frying pan. If the pan is made only of iron, what can Sam conclude?
The pan is a pure substance with the chemical symbol Ir.
The pan is a pure substance with the chemical symbol I.
The pan is a pure substance with the chemical symbol F.
The pan is a pure substance with the chemical symbol Fe.
contains 2 or more substances that are physically combined
element
compound
mixture
