Lesson 4.1.1.1
4.1.1.1 Atoms, elements and compounds Quiz: AQA Chemistry, Unit 1
20 questions
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Lesson 4.1.1.1, Atoms, elements and compounds: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 1: Atomic structure and the periodic table, written with Revision Ninja.
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The 20 questions
-
Which chemical symbol correctly represents an atom of sodium?
- No
- Na
- So
- Sd
-
What is the smallest part of an element that can still exist?
- Electron
- Atom
- Molecule
- Ion
-
Compounds are formed from elements by which process?
- Chemical reactions
- Simple distillation
- Physical separation
- Filtration
-
Roughly how many different elements are there?
- About 100
- About 10000
- About 1000
- About 10
-
Which feature is always present in a chemical compound?
- Physical links
- Variable ratios
- Ionic bonding
- Fixed proportions
-
What is always formed during a chemical reaction?
- Energy increase
- Gas bubbles
- New substances
- Solid precipitate
-
How many hydrogen atoms are in one molecule of water (H2O)?
- Four
- Two
- One
- Three
-
Which type of equation uses the names of reactants and products?
- Word equation
- Balanced equation
- Ionic equation
- Symbol equation
-
Which equation is correctly balanced?
- 2H2 + O2 gives 2H2O
- H2 + O2 gives 2H2O
- 2H2 + 2O2 gives H2O
- H2 + O2 gives H2O
-
How many atoms of each element are in one formula unit of Ca(OH)2?
- 1 Ca, 1 O, 2 H
- 1 Ca, 2 O, 1 H
- 2 Ca, 2 O, 2 H
- 1 Ca, 2 O, 2 H
-
Which symbol belongs to the element potassium?
- Pt
- K
- P
- Po
-
What is the name of the compound with formula NaCl?
- Sodium chloride
- Sodium chlorite
- Sodium chlorine
- Sodium chlorate
-
Where are reactants positioned in a standard chemical equation?
- Below arrow
- Left side
- Above arrow
- Right side
-
Which of these is the formula of a compound rather than an element?
- N2
- Ne
- HCl
- O2
-
Which list contains only elements?
- CO2, Ar, C
- H2O, O2, Na
- H2, O2, Na
- NaCl, Cl2, Ne
-
In the equation 4Na + O2 gives 2Na2O, how many sodium atoms react with 3 O2 molecules?
- 3
- 12
- 6
- 4
-
Which formula correctly represents magnesium chloride?
- Mg2Cl
- Mg2Cl3
- MgCl
- MgCl2
-
A compound contains 2 carbon, 6 hydrogen and 1 oxygen atoms per formula. Which formula fits?
- C2H6O2
- CH6O2
- C2H6O
- C2H5O
-
What distinguishes a chemical reaction from a physical change?
- Mass loss
- New substances formed
- Temperature change
- State change
-
In the equation 2H2O2 gives 2H2O + O2, how many atoms are on the left side?
- 6
- 8
- 10
- 4
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