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WorksheetsAQA C1 Chemistry Quiz
Total questions: 1
Worksheet time: 57mins
What is the smallest part of an element that can exist?
Molecule
Atom
Compound
How are atoms of each element represented?
By their atomic number
By their mass number
By a chemical symbol
By their color
Approximately how many different elements are there?
50
100
150
200
How are compounds formed?
By mixing elements physically
By chemical reactions
By heating elements
By dissolving elements in water
What do chemical reactions always involve?
The formation of one or more new substances
The destruction of atoms
The creation of energy
The change of color
How can chemical reactions be represented?
By pictures
By word equations or equations using symbols and formulae
By physical models
By color changes
What should students be able to do with the periodic table for the exam?
Memorize the entire table
Use the names and symbols of the first 20 elements
Draw the periodic table
Identify the colors of elements
What is a mixture?
A combination of two or more elements or compounds that are chemically combined.
A combination of two or more elements or compounds that are not chemically combined.
A single element or compound.
A combination of two or more elements or compounds that cannot be separated.
Which of the following is NOT a physical process used to separate mixtures?
Filtration
Crystallisation
Combustion
Chromatography
What did the discovery of the electron lead to in terms of atomic models?
The nuclear model
The plum pudding model
The planetary model
The quantum model
What was the conclusion from the alpha particle scattering experiment?
The atom is a ball of positive charge with negative electrons embedded in it.
The mass of an atom is concentrated at the centre (nucleus) and the nucleus is charged.
Electrons orbit the nucleus at specific distances.
The nucleus contains neutrons.
Who provided the evidence for the existence of neutrons within the nucleus?
Niels Bohr
Ernest Rutherford
James Chadwick
J.J. Thomson
Why did the new evidence from the scattering experiment lead to a change in the atomic model?
It showed that atoms are indivisible.
It demonstrated that electrons are in fixed orbits.
It revealed that atoms have a dense nucleus.
It proved that atoms are made of protons and neutrons.
What is the difference between the plum pudding model of the atom and the nuclear model of the atom?
The plum pudding model includes a dense nucleus.
The nuclear model has electrons embedded in a positive sphere.
The nuclear model includes a dense nucleus with electrons orbiting around it.
The plum pudding model has electrons orbiting a dense nucleus.
What is the relative electrical charge of a proton?
0
-1
+1
+2
Which subatomic particle has no electrical charge?
Proton
Neutron
Electron
Positron
What is the atomic number of an element?
The number of neutrons in an atom.
The number of electrons in an atom.
The number of protons in an atom.
The total number of protons and neutrons in an atom.
How do atoms of different elements differ?
They have different numbers of neutrons.
They have different numbers of protons.
They have different numbers of electrons.
They have different atomic masses.
Where is almost all of the mass of an atom located?
In the electrons
In the protons
In the nucleus
In the neutrons
What is the relative mass of a neutron?
0
1
Very small
2
What is the term for atoms of the same element with different numbers of neutrons?
Ions
Isotopes
Molecules
Compounds
Given the atomic number and mass number, what can students calculate about an atom or ion?
The number of protons, neutrons, and electrons
The number of molecules
The number of compounds
The number of isotopes
What does the relative atomic mass of an element take into account?
The number of protons
The number of neutrons
The abundance of the isotopes of the element
The number of electrons
What is the electronic structure of sodium?
2,8,1
2,8,2
2,7,1
2,8,0
In which energy level are the two electrons of sodium located?
First energy level
Second energy level
Third energy level
Fourth energy level
How are elements in the periodic table arranged?
By atomic mass
By atomic number
By alphabetical order
By density
What do elements in the same group of the periodic table have in common?
Same number of protons
Same number of neutrons
Same number of electrons in their outer shell
Same atomic mass
What is the periodic table called a "periodic" table?
Because it is updated periodically
Because similar properties occur at regular intervals
Because it is arranged in periods of time
Because it is used periodically in experiments
What should students be able to predict from the position of an element in the periodic table?
The element's color
The element's reactivity
The element's state of matter
The element's density
What does the electronic structure of an atom represent?
The arrangement of protons in the nucleus
The arrangement of neutrons in the nucleus
The arrangement of electrons in energy levels or shells
The arrangement of atoms in a molecule
Before the discovery of protons, neutrons, and electrons, how did scientists attempt to classify the elements?
By arranging them in order of their atomic weights
By arranging them alphabetically
By arranging them by color
By arranging them by state of matter
Who overcame some of the problems in the early periodic tables by leaving gaps for undiscovered elements?
Dmitri Mendeleev
Isaac Newton
Albert Einstein
Marie Curie
What made it possible to explain why the order based on atomic weights was not always correct?
Knowledge of isotopes
Discovery of new elements
Development of the electron microscope
Advancements in quantum mechanics
What are elements that react to form positive ions called?
Metals
Non-metals
Noble gases
Halogens
Where are metals generally found on the periodic table?
To the left and towards the bottom
To the right and towards the top
In the center
Only in the first row
What should students be able to explain about the differences between metals and non-metals?
Their characteristic physical and chemical properties
Their color and taste
Their size and shape
Their density and volume
How are the reactions of elements related to the arrangement of electrons in their atoms?
They are related to their atomic number
They are related to their mass number
They are related to their density
They are related to their volume
What are the elements in Group 0 of the periodic table called?
Alkali metals
Halogens
Noble gases
Transition metals
Why are the elements in Group 0 unreactive?
They have a full outer shell of electrons
They have a single electron in their outer shell
They have no electrons in their outer shell
They have unstable arrangements of electrons
Which element in Group 0 has only two electrons in its outer shell?
Neon
Argon
Helium
Krypton
What trend is observed in the boiling points of noble gases as you go down Group 0?
Boiling points decrease
Boiling points remain the same
Boiling points increase
Boiling points fluctuate
What are the elements in Group 1 of the periodic table known as?
Noble gases
Halogens
Alkali metals
Transition metals
What characteristic property do the elements in Group 1 have?
They have a full outer shell of electrons
They have a single electron in their outer shell
They have no electrons in their outer shell
They have unstable arrangements of electrons
What happens to the reactivity of elements in Group 1 as you go down the group?
Reactivity decreases
Reactivity remains the same
Reactivity increases
Reactivity fluctuates
What are the elements in Group 7 of the periodic table known as?
Alkali metals
Noble gases
Halogens
Transition metals
Why do elements in Group 7 have similar reactions?
They all have the same number of protons.
They all have seven electrons in their outer shell.
They all have the same atomic mass.
They all have the same number of neutrons.
What happens to the reactivity of elements in Group 7 as you go down the group?
It increases.
It decreases.
It remains the same.
It fluctuates.
What can a more reactive halogen do to a less reactive halogen in an aqueous solution of its salt?
Combine with it
Displace it
Neutralize it
Dissolve it
What is the trend in the relative molecular mass, melting point, and boiling point of elements in Group 7 as you go down the group?
They decrease.
They increase.
They remain constant.
They first increase then decrease.
What do chemists use theories of structure and bonding to explain?
The physical and chemical properties of materials
The color of materials
The taste of materials
The weight of materials
How can atoms be arranged according to the analysis of structures?
Only in molecular structures
Only in giant structures
In a variety of ways, including molecular and giant structures
Only in crystalline structures
What do theories of bonding explain?
How atoms are held together in structures
The color of atoms
The size of atoms
The weight of atoms
What can scientists use the knowledge of structure and bonding to do?
Engineer new materials with desirable properties
Change the color of materials
Increase the weight of materials
Decrease the size of materials
Which of the following types of chemical bonds involves the sharing of pairs of electrons between atoms?
Ionic bonding
Covalent bonding
Metallic bonding
Hydrogen bonding
In which type of bonding do the particles share delocalised electrons?
Ionic bonding
Covalent bonding
Metallic bonding
Hydrogen bonding
Ionic bonding occurs in compounds formed from:
Non-metals combined with non-metals
Metals combined with non-metals
Metals combined with metals
Noble gases combined with metals
What happens to metal atoms during the formation of an ionic bond?
They gain electrons to become negatively charged ions.
They lose electrons to become positively charged ions.
They share electrons equally with non-metal atoms.
They share delocalised electrons with other metal atoms.
The electron transfer during the formation of an ionic compound can be represented by:
A Lewis structure
A dot and cross diagram
A molecular orbital diagram
A VSEPR model
The ions produced by metals in Groups 1 and 2 and by non-metals in Groups 6 and 7 have the electronic structure of:
A noble gas (Group 0)
A transition metal
A halogen
An alkali metal
What type of structure do ionic compounds form?
Molecular structure
Giant structure of ions
Covalent structure
Metallic structure
What holds ionic compounds together?
Covalent bonds
Metallic bonds
Hydrogen bonds
Electrostatic forces of attraction
What is the term for the forces that act in all directions in the lattice of an ionic compound?
Covalent bonding
Metallic bonding
Ionic bonding
Hydrogen bonding
Which of the following is a correct representation of the structure of sodium chloride?
What should students be able to deduce from a diagram of an ionic compound's structure?
The molecular formula
The type of bonding
That the compound is ionic
The melting point
What is one of the limitations of using dot and cross diagrams to represent a giant ionic structure?
They do not show the 3D structure
They are too complex
They do not show the type of ions
They are not accurate
What should students be able to work out from a given model or diagram of an ionic compound?
What type of bond is formed when atoms share pairs of electrons?
Ionic bond
Metallic bond
Covalent bond
Hydrogen bond
Which of the following substances can have giant covalent structures?
Water
Diamond
Ammonia
Methane
What is an example of a substance with very large molecules?
Water
Oxygen
Polymer
Carbon dioxide
What is the chemical formula for ammonia?
NH3
H2O
CO2
CH4
How can covalent bonds in molecules and giant structures be represented?
Only as molecular formulas
Only as structural formulas
As molecular formulas, structural formulas, and 3D models
Only as 3D models
Which of the following molecules can be represented using dot and cross diagrams according to the learning material?
Hydrogen
Sodium chloride
Potassium
Calcium carbonate
What is used to represent a single bond in the covalent bonds of small molecules?
A dot
A cross
A line
A circle
What is the role of delocalised electrons in metallic bonding?
They form ionic bonds.
They are free to move through the whole structure.
They are fixed in place.
They form covalent bonds.
What type of structures do metals consist of?
Small molecules
Giant structures of atoms arranged in a regular pattern
Randomly arranged atoms
Single atoms
What gives rise to strong metallic bonds in metals?
Sharing of delocalised electrons
Sharing of protons
Sharing of neutrons
Sharing of covalent bonds
Which of the following is a key opportunity for skills development in the context of metallic bonding?
MS 5b
WS 1.2
Both A and B
None of the above
What are the three states of matter?
Solid, Liquid, Gas
Solid, Liquid, Plasma
Liquid, Gas, Plasma
Solid, Gas, Plasma
At what point does melting and freezing take place?
Boiling point
Melting point
Condensing point
Sublimation point
What does particle theory help to explain?
Only melting and freezing
Only boiling and condensing
Melting, boiling, freezing, and condensing
Only sublimation
In the simple model of states of matter, how are particles represented?
As small solid spheres
As small liquid droplets
As small gas bubbles
As small plasma particles
What does the amount of energy needed to change state depend on?
The color of the substance
The strength of the forces between the particles
The shape of the particles
The size of the particles
What is a limitation of the simple model of states of matter?
Particles are represented as liquid droplets
Particles are represented as gas bubbles
Particles are represented as solid inelastic spheres with no forces between them
Particles are represented as plasma particles
In chemical equations, what state symbol is used to represent a solid?
(a) (l)
(b) (g)
(c) (s)
(d) (aq)
What is the primary reason ionic compounds have high melting and boiling points?
(a) They have weak intermolecular forces.
(b) They have strong covalent bonds.
(c) They have strong electrostatic forces of attraction between oppositely charged ions.
(d) They have low molecular weights.
Why do ionic compounds conduct electricity when melted or dissolved in water?
(a) Because they have high melting points.
(b) Because the ions are free to move and carry charge.
(c) Because they have strong covalent bonds.
(d) Because they have weak intermolecular forces.
What type of substances are usually gases or liquids with relatively low melting and boiling points?
(a) Ionic compounds
(b) Small molecules
(c) Metals
(d) Polymers
What type of forces are overcome when small molecular substances melt or boil?
(a) Covalent bonds
(b) Ionic bonds
(c) Intermolecular forces
(d) Metallic bonds
Why do larger molecules have higher melting and boiling points?
(a) Because they have stronger covalent bonds.
(b) Because they have more intermolecular forces.
(c) Because they have higher molecular weights.
(d) Because they conduct electricity.
What type of bonds link the atoms in polymer molecules?
Ionic bonds
Metallic bonds
Covalent bonds
Hydrogen bonds
Why are substances with giant covalent structures solids with very high melting points?
They have weak intermolecular forces.
They have strong ionic bonds.
They have strong covalent bonds.
They have metallic bonds.
Which of the following is an example of a giant covalent structure?
Sodium chloride
Diamond
Magnesium oxide
Water
Why are pure metals often too soft for many uses?
Atoms in pure metals are arranged in layers.
Pure metals have weak metallic bonds.
Pure metals have low melting points.
Pure metals have high electrical conductivity.
Why are alloys generally harder than pure metals?
Alloys have higher melting points.
Alloys have stronger metallic bonds.
Alloys have distorted layers of atoms.
Alloys have higher electrical conductivity.
Why are metals good conductors of electricity?
They have strong covalent bonds.
They have delocalised electrons.
They have high melting points.
They have high density.
What type of structure does each carbon atom form in diamond?
Three covalent bonds with other carbon atoms
Four covalent bonds with other carbon atoms
Two covalent bonds with other carbon atoms
One covalent bond with other carbon atoms
Which of the following is NOT a property of diamond?
Very hard
High melting point
Conducts electricity
Giant covalent structure
How many covalent bonds does each carbon atom form in graphite?
One
Two
Three
Four
What is a unique feature of graphite compared to diamond?
High melting point
Delocalised electrons
Four covalent bonds
Does not conduct electricity
