Lesson T2.2.1
T2.2.1 Chemical symbols and formulae Quiz: KS3 Chemistry, Unit 2
20 questions
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Lesson T2.2.1, Chemical symbols and formulae: 20 multiple choice questions for the KS3 Chemistry (National Curriculum), Unit 2: Atoms, elements and compounds, written with Revision Ninja.
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The 20 questions
-
What is the chemical symbol for oxygen?
- Ox
- O
- Oz
- Os
-
What is the chemical symbol for sodium?
- Sn
- Sd
- So
- Na
-
What is the chemical symbol for iron?
- I
- In
- Ir
- Fe
-
What is the chemical formula of water?
- H3O
- HO2
- H2O
- H2O2
-
What does the subscript 2 in the chemical formula H2O indicate?
- Two water molecules
- Two hydrogen atoms
- Total atoms
- Two oxygen atoms
-
What is the formula of carbon dioxide?
- CO
- C2O
- CO2
- CO3
-
How many atoms are in one molecule of ammonia, NH3?
- One
- Four
- Two
- Three
-
Which formula represents an element rather than a compound?
- H2O
- CO2
- O2
- NaCl
-
What is the symbol for potassium?
- K
- Po
- P
- Pt
-
How many oxygen atoms are in one formula unit of Ca(OH)2?
- Four
- One
- Three
- Two
-
What is the chemical symbol for copper?
- Co
- Cr
- Cu
- Cp
-
Which symbol is correct for the element lead?
- Pb
- Ls
- Le
- Ld
-
Which is the correct formula for magnesium oxide, given Mg2+ and O2- ions?
- MgO2
- MgO
- Mg2O
- Mg2O2
-
How many hydrogen atoms are present in 3 molecules of H2O?
- Three
- Six
- Two
- Nine
-
What is the total number of atoms shown in the formula 2H2O?
- Four
- Eight
- Six
- Three
-
Which formula shows a compound made of two different elements?
- NaCl
- O3 gas
- Fe metal
- N2 gas
-
What is the chemical symbol for silver?
- Ag
- Si
- Sr
- Sv
-
How many hydrogen atoms are in a single methane molecule (CH4)?
- Two atoms
- One atom
- Four atoms
- Five atoms
-
What is the formula of sulfur dioxide, which has one sulfur atom and two oxygen atoms?
- SO3
- S2O
- SO
- SO2
-
Which symbol is correct for calcium?
- Cr
- Cl
- Ca
- Cn
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