C2 GCSE Chemistry Revision Quiz

George is conducting a science experiment where he removes an electron from a sodium atom. What happens to the sodium atom in this case?

• It becomes negatively charged 

• It becomes positively charged

• None of the above

During a science class, Michael and Jolie were discussing about the elements. Michael said that one of the elements has a full valence shell. Which element was Michael referring to?

• Oxygen

• Neon

• Barium

• Carbon

In a chemistry class experiment, Sasha and Lucia observed that when atoms of certain elements like Sodium and Chlorine interact, they ___________ electrons. What term best describes this interaction?

• gain

• share

• increase

• transfer

George and Jolie are in a chemistry class. They are discussing about the type of bond in a molecule of oxygen that they breathe. They concluded that it has an equal sharing of electrons. What type of bond did they conclude it to be?

• Polar Covalent 

• Non Polar Covalent

• Ionic

• Metallic

Alec and Chuckles are in a chemistry class. Their teacher, Miss Lucia, uses a real-world example to explain a concept. She says, 'When salt is dissolved in water, a certain type of bond occurs which involves a transfer of an electron from one atom to another. What is this type of bond called?'

• Polar Covalent 

• Non Polar Covalent

• Ionic

• Metallic

Michael has a sodium atom and it loses two electrons. What charge will the sodium atom have now?

• + 2

•  - 2

• +1

• -1

JT and Jolie are in a chemistry lab. They are experimenting with different types of bonds. They noticed that when electrons are shared unequally between Alec's atom and Searby's atom, a/an ___________ bond is formed. What type of bond is this?

• ionic 

• hydrogen

• polar covalent 

• nonpolar covalent

Lucia and Alfie are studying chemistry and they come across a substance. They notice that the substance forms hard, brittle crystals with characteristic shapes. Based on this observation, Marley suggests that the substance could be an ionic compound. Which characteristic property of ionic compounds makes Marley think so?

• They form hard, brittle crystals with characteristic shapes

• They have low melting points

• They have low boiling points

• They contain no charged particles

Marley and Alec were discussing the properties of ionic compounds. Marley said that one of the characteristic properties of ionic compounds is that they form hard, brittle crystals with characteristic shapes. Alec, however, disagreed and proposed other options. Which of Alec's propositions is incorrect?

• They form hard, brittle crystals with characteristic shapes

• They have low melting points

• They have low boiling points

• They contain no charged particles

Marley and Lucia are conducting a science experiment. They want to see if the ionic compound they have can conduct electricity. In what form should they use the compound to conduct electricity?

• when dissolved in water

• as a solid

• as a crystal

• when warmed slightly