Electron Arrangement in atoms practice exercise 4

During a school experiment in Kisii, a small grey metal (Element X) is added to water and reacts rapidly. Its electron arrangement is given as 2.1.Which element is most likely X based on its dot and cross diagram?

During a school experiment in Kisii, a small grey metal (Element X) is added to water and reacts rapidly. Its electron arrangement is given as 2.1. Which element is most likely X based on its dot and cross diagram? (1 mark)

During a school experiment in Kisii, a small grey metal (Element X) is added to water and reacts rapidly. Its electron arrangement is given as 2.1. Which element is most likely X based on its dot and cross diagram? (1 mark)

During a school experiment in Kisii, a small grey metal (Element X) is added to water and reacts rapidly. Its electron arrangement is given as 2.1. Which element is most likely X based on its dot and cross diagram? (1 mark)

Which statement best explains the arrangement of electrons in the diagram below?

Sodium vapor lamps are used for street lighting in many Kenyan towns. Which statement best explains the arrangement of electrons in the diagram below? (1 mark)

Sodium vapor lamps are used for street lighting in many Kenyan towns. Which statement best explains the arrangement of electrons in the diagram below? (1 mark)

Sodium vapor lamps are used for street lighting in many Kenyan towns. Which statement best explains the arrangement of electrons in the diagram below? (1 mark)

Sodium vapor lamps are used for street lighting in many Kenyan towns. Which statement best explains the arrangement of electrons in the diagram below? (1 mark)

Which element is represented by the electron dot and cross diagram below?

Charcoal is mainly made of carbon and is used in many Kenyan households for cooking. Which element is represented by the electron dot  diagram below? (1 mark)

Charcoal is mainly made of carbon and is used in many Kenyan households for cooking. Which element is represented by the electron dot  diagram below? (1 mark)

Charcoal is mainly made of carbon and is used in many Kenyan households for cooking. Which element is represented by the electron dot  diagram below? (1 mark)

Sarah is studying how nitrogen is used in fertilizer production. If nitrogen has an atomic number of 7, which of the following correctly shows its electron arrangement using the 2,8,8 rule?

Sarah is studying how nitrogen is used in fertilizer production. If nitrogen has an atomic number of 7, which of the following correctly shows its electron arrangement using the 2,8,8 rule? (1 mark)

Sarah is studying how nitrogen is used in fertilizer production. If nitrogen has an atomic number of 7, which of the following correctly shows its electron arrangement using the 2,8,8 rule? (1 mark)

Sarah is studying how nitrogen is used in fertilizer production. If nitrogen has an atomic number of 7, which of the following correctly shows its electron arrangement using the 2,8,8 rule? (1 mark)

In a CBC water purification project, learners identify an element with the following dot and cross electron arrangement:First shell: 2 electronsSecond shell: 8 electronsThird shell: 7 electronsWhich element is this?

In a CBC water purification project, learners identify an element with the following dot and cross electron arrangement: First shell: 2 electrons, Second shell: 8 electrons, Third shell: 7 electrons. Which element is this?  (1 mark)

In a CBC water purification project, learners identify an element with the following dot and cross electron arrangement: First shell: 2 electrons, Second shell: 8 electrons, Third shell: 7 electrons. Which element is this?  (1 mark)

In a CBC water purification project, learners identify an element with the following dot and cross electron arrangement: First shell: 2 electrons, Second shell: 8 electrons, Third shell: 7 electrons. Which element is this?  (1 mark)

James uses Helium gas for cooling a scientific device. What is the electron arrangement of Helium?

James uses Helium gas for cooling a scientific device. What is the electron arrangement of Helium? (1 mark)

James uses Helium gas for cooling a scientific device. What is the electron arrangement of Helium? (1 mark)

James uses Helium gas for cooling a scientific device. What is the electron arrangement of Helium? (1 mark)

Magnesium is used in fireworks to produce bright white light. Given its atomic number is 12, what is its correct electron arrangement?

Magnesium is used in fireworks to produce bright white light. Given its atomic number is 12, what is its correct electron arrangement? (1 mark)

Magnesium is used in fireworks to produce bright white light. Given its atomic number is 12, what is its correct electron arrangement? (1 mark)

Magnesium is used in fireworks to produce bright white light. Given its atomic number is 12, what is its correct electron arrangement? (1 mark)

In a CBC project on roofing materials, learners are shown a dot and cross diagram with 2 electrons in the first shell, 8 in the second, and 3 in the third shell.Which element does this diagram represent?

In a CBC project on roofing materials, learners are shown a dot and cross diagram with 2 electrons in the first shell, 8 in the second, and 3 in the third shell. Which element does this diagram represent? (1 mark)

In a CBC project on roofing materials, learners are shown a dot and cross diagram with 2 electrons in the first shell, 8 in the second, and 3 in the third shell. Which element does this diagram represent? (1 mark)

In a CBC project on roofing materials, learners are shown a dot and cross diagram with 2 electrons in the first shell, 8 in the second, and 3 in the third shell. Which element does this diagram represent? (1 mark)

Learners in Kitale are studying ammonium-based fertilisers. They come across an atom diagram showing:2 electrons in the first shell5 in the second shellWhich element should they label this diagram as?

Learners in Kitale are studying ammonium-based fertilisers. They come across an atom diagram showing: 2 electrons in the first shell, 5 in the second shell. Which element should they label this diagram as? (1 mark)

Learners in Kitale are studying ammonium-based fertilisers. They come across an atom diagram showing: 2 electrons in the first shell, 5 in the second shell. Which element should they label this diagram as? (1 mark)

A team in Nakuru is testing a mineral sample suspected to contain phosphorus. They learn that the element has 15 electrons.Which of the following electron arrangements would they use to draw a correct dot and cross diagram for this atom?

A team in Nakuru is testing a mineral sample suspected to contain phosphorus. They learn that the element has 15 electrons. Which of the following electron arrangements would they use to draw a correct dot and cross diagram for this atom? (1 mark)

A team in Nakuru is testing a mineral sample suspected to contain phosphorus. They learn that the element has 15 electrons. Which of the following electron arrangements would they use to draw a correct dot and cross diagram for this atom? (1 mark)

A team in Nakuru is testing a mineral sample suspected to contain phosphorus. They learn that the element has 15 electrons. Which of the following electron arrangements would they use to draw a correct dot and cross diagram for this atom? (1 mark)