Arsenic (As) has 5 valence electrons. Since arsenic is in group 15 (or 5A) of the periodic table, it has 5 valence electrons.
Use the periodic table to answer the question. How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or the Nitrogen family). (1 point) Responses 15 15 33 33 5 5 4
11 answers
Use the periodic table to answer the question. How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or the Nitrogen family). (1 point) Responses 15 15 33 33 5 5 4
Arsenic (As) has 5 valence electrons. The correct response is 5.
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 electrons. They have the same number of electrons. They have valence electrons in different energy levels. They have valence electrons in different energy levels. They have the same number of valence electrons. They have the same number of valence electrons. They have valence electrons in the same energy level.
The correct statement is: They have valence electrons in the same energy level.
Nitrogen and oxygen both belong to period 2 of the periodic table, meaning they have their valence electrons in the same energy level (the second energy level). However, they have different numbers of valence electrons: nitrogen has 5 valence electrons, and oxygen has 6.
Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?(1 point) Responses Helium 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. Helium 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. Helium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level. Helium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level. Helium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons. Helium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons. Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
The correct response is: Helium 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.
Although helium has a full outer energy level with 2 electrons, it differs from the other noble gases (like neon, argon, etc.) in that they have their valence electrons in the second energy level (for neon, for example) and beyond.
Use the periodic table to answer the question. Which element has atoms with valence electrons in a higher energy level than those of calcium (Ca)? (1 point) Responses cesium (Cs) cesium (Cs) lithium (Li) lithium (Li) oxygen (O) oxygen (O) bromine (Br)
The element that has atoms with valence electrons in a higher energy level than those of calcium (Ca) is cesium (Cs).
Calcium is in period 4, and its valence electrons are in the fourth energy level. Cesium, on the other hand, is in period 6 and has its valence electrons in the sixth energy level, which is higher than that of calcium.
Use the periodic table to answer the question. Which statement best describes the arrangement of electrons in an atom of fluorine (F)? (1 point) Responses There are two electrons in the first energy level and seven electrons in the second energy level. There are two electrons in the first energy level and seven electrons in the second energy level. There are seven electrons in the first energy level and two electrons in the second energy level. There are seven electrons in the first energy level and two electrons in the second energy level. There are two electrons in the first energy level and five electrons in the second energy level. There are two electrons in the first energy level and five electrons in the second energy level. There are five electrons in the first energy level and two electrons in the second energy level.
The correct statement that 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 a total of 9 electrons: 2 in the first energy level and 7 in the second energy level (as it is in group 17, which has 7 valence electrons).
1 answer