Shannon Bradner
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Year 9 (Triple Chemistry - Paper C - Bonding, Fullerenes, Alletropes) Chemistry Test sobre Triple Chemistry C - Quiz, creado por Shannon Bradner el 20/04/2019.

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Shannon Bradner
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Triple Chemistry C - Quiz

Pregunta 1 de 11

1

A polymer contains two types of bond. What are they?

Selecciona una de las siguientes respuestas posibles:

  • Covalent and intramolecular?

  • Ionic and covalent?

  • Covalent and intermolecular?

  • Ionic and intermolecular?

Explicación

Pregunta 2 de 11

1

Rellena los espacios en blanco para completar el texto.

When metals form ions, they electrons, resulting in a charged atom (otherwise known as a cation). When a non-metal forms an ion, they electrons, resulting in a charged ion (also known as an anion). The amount of electrons gained or lost forms the of an ion.

The of electrons in ionic bonding can be shown with a and cross diagram.

Explicación

Pregunta 3 de 11

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

As you go down the groups, the reactivity changes. In groups 1 and 2, as you go down, the reactivity ( increases, decreases ). This is because the outer shell is ( closer to, further away ) from the ( nucleus, other shells ) and the electrons have ( less, more ) of an attraction to the nucleus, meaning they can give away their valence electrons easier.

As you go down groups 6 and 7, it is the ( opposite, same ). As you go down the elements become ( more, less ) reactive. The valence electrons are still less attracted to the nucleus, but that makes it ( easier, harder ) for them to attract more electrons.

Explicación

Pregunta 4 de 11

1

Ionic compounds have a giant . The positive / negative bonds hold each in place in the structure.

Arrastra y suelta para completar el texto.

    regular
    irregular
    lattice
    lettuce
    structure
    ion
    atom
    3D
    2D

Explicación

Pregunta 5 de 11

1

The order of strength in bonds from highest to lowest is:
Ionic
Metallic
Covalent
Intermolecular.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 6 de 11

1

Ionic compounds conduct electricity as solids, liquids and dissolved.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 7 de 11

1

Rellena los espacios en blanco para completar el texto.

Metals also have a structure. The valence electrons of each metal atom are lost to the structure to create a sea of electrons. This turns each metal atom into a positive . The positive / negative charges create an electrostatic forces that keep the delocalised electrons within the structure, but still free to move around.

Pure metals have a melting and boiling point, high tensile strength and are also malleable.

Explicación

Pregunta 8 de 11

1

Tick all that apply about small molecules.

Selecciona una o más de las siguientes respuestas posibles:

  • They have low melting and boiling points.

  • They are made with two and only two non-metal atoms.

  • The molecules can bond together with intermolecular forces to create a larger version of itself. (e.g lots of molecules of water make a glass of water).

  • The intermolecular forces are easy to break but the covalent bonds inside the molecules aren't.

  • Most are gaseous or liquid at room temperature.

  • They are good conductors.

  • They have high melting and boiling points.

  • They are made of two or more non-metal atoms.

Explicación

Pregunta 9 de 11

1

Giant covalent structures are sometimes known as macromolecules.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 10 de 11

1

An alletrope is a pure element in a physical form.

There are many alletropes of carbon.

Diamond is one of them. It has a structure where each carbon atom forms covalent bonds. This makes it very and a non-conductor. Diamond is and is good for .

Graphite (and graphene, which is just of graphite) is different. It has a hexagonal ring structure that forms covalent bonds. This leaves one free electron per carbon atom, making graphite and graphene very good conductors of electricty and a very good insulator.

The layers of graphene in graphite are held together very , which means the layers can slide over each other easily. Graphite is and opaque with a high melting point, whereas graphene is just thick, transparent and light.

Graphite and graphene are used in pencils and graphene is often used in computer microchips.

Arrastra y suelta para completar el texto.

    different
    tetrahedral
    hexagonal
    hard
    soft
    lustrous
    jewellery
    multiple layers
    a single layer
    three
    four
    loosely
    tightly
    black
    white
    one atom
    two atoms

Explicación

Pregunta 11 de 11

1

Rellena los espacios en blanco para completar el texto.

Nanoparticles are between and 100 nanometres. They are than atoms and small molecules but than pretty much everything else. They have a high surface area to ratio meaning a bigger portion of the particle can react on contact.

Nanoparticles are good (meaning they can speed up a reaction)< they are good in cosmetics and lubricants, they conduct electricity, are very durable and can contain anti-bacterial proerties.
A , which can deliver drugs to the body, is a good example of a nanoparticle.

Unfortunately, the effect of nanoparticles on the human body is not yet understood, meaning they could be harmful.

Explicación

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