Two representative elements, nitrogen and oxygen, are in the same period of the periodic table. Which statement correctly describes the atoms of the two elements?(1 point) Responses: they have the same number of valence electrons.They have the same number of valence electrons.They have valence electrons in different energy levels.%0D%0AThey have valence electrons in different energy levels.%0D%0A%0D%0AThey have valence electrons in the same energy. They have valence electrons in the same energy

Question

.They have the same number of electrons.

Answer 1

The correct statement is: They have the same number of valence electrons.

Nitrogen (N) and oxygen (O) both belong to the same group (Group 15 for nitrogen and Group 16 for oxygen) in the periodic table, meaning they both have valence electrons. However, nitrogen has 5 valence electrons and oxygen has 6 valence electrons.

More accurately, they are in the same period (Period 2), but have different numbers of valence electrons (5 for nitrogen and 6 for oxygen).

Therefore, a more precise correct response to your query should be: They have valence electrons in the same energy level. This is because both elements are in Period 2 and have their valence electrons in the second energy level.

Answer 2

Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?(1 point)%0D%0AResponses%0D%0A%0D%0AHelium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.%0D%0AHelium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.%0D%0A%0D%0AHelium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.%0D%0AHelium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.%0D%0A%0D%0AHelium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.%0D%0AHelium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.%0D%0A%0D%0AHelium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons.

Answer 3

The correct statement is: Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

To elaborate:

• Helium is a noble gas like the other elements in Group 18, but it is unique because it has only 2 electrons (which fill its first energy level), giving it 2 valence electrons. It has a full outer energy level (the first energy level), which makes it stable.
• All the other noble gases (like neon, argon, krypton, xenon, and radon) have a full outer energy level but have 8 valence electrons because they occupy the second energy level or higher.

So, while helium has a full outer energy level, it does not have 8 valence electrons like the other noble gases; it has only 2. Thus, the first statement correctly highlights this distinction.

Answer 4

Which statement best describes the arrangement of electrons in an atom of fluorine (F)?%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0AThere are five electrons in the first energy level and two electrons in the second energy level.%0D%0AThere are five electrons in the first energy level and two electrons in the second energy level.%0D%0A%0D%0AThere are two electrons in the first energy level and five electrons in the second energy level.%0D%0AThere are two electrons in the first energy level and five electrons in the second energy level.%0D%0A%0D%0AThere are seven electrons in the first energy level and two electrons in the second energy level.%0D%0AThere are seven electrons in the first energy level and two electrons in the second energy level.%0D%0A%0D%0AThere are two electrons in the first energy level and seven electrons in the second energy level.

Answer 5

The statement that best describes the arrangement of electrons in an atom of fluorine (F) is: There are two electrons in the first energy level and five electrons in the second energy level.

Fluorine has an atomic number of 9, which means it has 9 electrons.

The electron arrangement is as follows:

• The first energy level can hold a maximum of 2 electrons.
• The second energy level can hold up to 8 electrons.

In the case of fluorine, the arrangement is:

• 2 electrons in the first energy level
• 7 electrons in the second energy level (not 5, so this would be incorrect).

The correct answer is, therefore: There are two electrons in the first energy level and seven electrons in the second energy level.

That is the accurate description of an atom of fluorine.