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WorksheetsRecognize that substances are classified into elements and c
Total questions: 10
Worksheet time: 2mins
What is the basic unit of matter?
atom
compound
mixture
molecule
Erbium an element with a symbol of Er, derived its name and symbol from what origin?
name of city/town/place
name of a scientist
heavenly bodies
ancient name
Which of the following elements does not belong to the group?
Tin (Sn)
Sodium (Na)
Iron (Fe)
Helium (He)
Which name and symbol of elements are paired correctly?
Copper-Co
Cobalt-Co
Carbon-Ca
Chromium- Ch
Symbols of elements are derived from; their ancient names, first letter, first letter and other letter from the name, heavenly bodies, names of scientist, and places. The symbol for tungsten is W, Potassium is K and mercury is Hg. Where are these symbols derived from?
Ancient names
Heavenly bodies
Name of Scientist
Places
A compound is formed from combining atoms of elements. Which is not true about compound?
Compound is a chemical combination of atoms of elements
Compounds can only be separated by chemical means like electrolysis.
Compounds can be separated by physical means like evaporation or distillation.
Compounds are combined with definite proportion, changing the proportion changes the compound.
What kind of substance will be formed when different atoms of elements are chemically combined?
atom
compound
mixture
molecule
Which of the following illustration below DOES NOT correctly illustrate a compound?
What can be used to decompose a compound?
electrolysis
distillation
evaporation
filtration
Which of the following compounds shows a combination of two atoms of the same element?
