Atoms, Elements, Molecules and Compounds Practice exercise 3

What is the basic difference between an element and a compound in terms of atomic composition?  (1mark)

What is the basic difference between an element and a compound in terms of atomic composition?  (1mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?.(1 mark)

What happens when atoms of some elements and compounds cannot exist independently?  (1 mark)

Carbon dioxide (CO₂) contains one carbon atom and two oxygen atoms. Explain why CO₂ is classified as a compound rather than an element.  (1 mark)

Carbon dioxide (CO₂) contains one carbon atom and two oxygen atoms. Explain why CO₂ is classified as a compound rather than an element.  (1 mark)

Carbon dioxide (CO₂) contains one carbon atom and two oxygen atoms. Explain why CO₂ is classified as a compound rather than an element.  (1 mark)

Define an atom in terms of its role in chemical changes.  (1 mark)

Define an atom in terms of its role in chemical changes.  (1 mark)

Define an atom in terms of its role in chemical changes.  (1 mark)

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element? (1 mark).

How is a compound different from an element?   (1 mark).

A learner says that all small groups of atoms are called compounds. Based on your notes, is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Based on your notes, is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Based on your notes, is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds, is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner says that all small groups of atoms are called compounds. Is this true? Explain your answer.(2 marks)

A learner is given a sample of carbon (IV) oxide gas. The learner argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer.(2 marks)

A learner is given a sample of carbon (IV) oxide gas. The learner argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer.(2 marks)

A learner is given a sample of carbon (IV) oxide gas. The learner argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer.(2 marks)

A learner is given a sample of carbon (IV) oxide gas. The learner argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer.(2 marks)

A learner is given a sample of carbon (IV) oxide gas. The learner argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer.(2 marks)

The image below shows a sample of carbon (IV) oxide gas. A learner is given the sample and argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer. (2 marks)

The image below shows a sample of carbon (IV) oxide gas. A learner is given the sample and argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer. (2 marks)

The image below shows a sample of carbon (IV) oxide gas. A learner is given the sample and argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer. (2 marks)

The image below shows a sample of carbon (IV) oxide gas. A learner is given the sample and argues that carbon (IV) oxide is an element because it contains carbon atoms. Do you agree? Explain your answer. (2 marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?.( 2marks)

A chemist discovers a new substance that contains only hydrogen atoms. The atoms cannot exist alone and always combine in pairs (H₂). Is this substance classified as an element or a compound?  ( 2marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

A gas sample contains 3 oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer.(2 marks)

The image below shows a gas sample containing three oxygen atoms chemically bonded together to form O₃.A learner says this gas is a compound. Do you agree? Explain your answer. (2 marks)

The image below shows a gas sample containing three oxygen atoms chemically bonded together to form O₃.A learner says this gas is a compound. Do you agree? Explain your answer. (2 marks)

The image below shows a gas sample containing three oxygen atoms chemically bonded together to form O₃. A learner says this gas is a compound. Do you agree? Explain your answer. (2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

A learner breaks down a substance into carbon and oxygen atoms. They say the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

The image below shows a substance that a learner has broken down into carbon and oxygen atoms. A learner says the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

The image below shows a substance that a learner has broken down into carbon and oxygen atoms. A learner says the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

The image below shows a substance that a learner has broken down into carbon and oxygen atoms. A learner says the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)

The image below shows a substance that a learner has broken down into carbon and oxygen atoms. A learner says the substance is an element because it contains carbon. Do you agree? Explain.(2 marks)