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WorksheetsAtoms and molecules
Total questions: 10
Worksheet time: 5mins
Atomic mass can be best defined as:
1/16th the mass of an oxygen atom
1/13th the mass of a carbon atom
1/12th the mass of a carbon atom
1/15th the mass of an oxygen atom
Nitrogen is
Monovalent
Divalent
Trivalent
Tetravalent
"Matter can be neither be created nor be destroyed" is stated by
Law of defined proportions
Law of conservation of mass
Proust's law
Dalton's Atomic theory
This is the molecule of:
Sodium
Sulphur
Phosphorus
Ozone
The reactants of the equation CO2 + 2H2 → CH3OH is:
CO2 and H2
Only H2
CO2,H2 and CH3OH
CO2 and CH3OH
What does an atomic number represent?
How much an atom weighs
The number of protons or electrons
The sum of protons and electrons
The sum of protons and electrons
Which one of these is the correct symbol for mercury
Me
me
Hg
HG
which of the following statement is not correct ?
1. atoms are neutral
2. atoms are basic units of matter
3. atoms aggregate to form large molecules
4.atoms exist indepedently
1
3
2
4
