arsenic
An element cannot have 4 electrons in the 2 s level. The s subshell can hold only TWO electrons. Carbon has 4 electrons in the 2p level, however, if that's what you meant.
The element with that electron configuration has 4 electrons in the third level. There are 2 electrons in the 3s sublevel and 2 more electrons in the 3p sublevel. This means 4 valence electrons total. This element is silicon (Si, #14).
To find the element with a 3p4 valence configuration, look in period 3 and group XVI, and that is ...S, sulfur.
Zero. Calcium has two electrons in its 4s sublevel, and none in the 3d sublevel. The 3d sublevel doesn't start filling until after the 4s sublevel is filled.
Aufbau says that the sublevels fill 1s2, 2s2, 2p6. That would mean that you must have filled 1 and 2 s (=4) and 3 more. Last I checked, 3 + 4 = 7. Which element has 7 electrons? I'll give you a hint: its atomic number is 7. Another hint: its symbol is N.
CARBON
Selenium or Se
An element cannot have 4 electrons in the 2 s level. The s subshell can hold only TWO electrons. Carbon has 4 electrons in the 2p level, however, if that's what you meant.
The electron configuration indicates that the element ne3s2 3p4 belongs to the p-block in period 3 of the periodic table. It is specifically in group 16 (also known as group VI-A or 6A), which includes elements such as oxygen and sulfur.
The element with that electron configuration has 4 electrons in the third level. There are 2 electrons in the 3s sublevel and 2 more electrons in the 3p sublevel. This means 4 valence electrons total. This element is silicon (Si, #14).
To find the element with a 3p4 valence configuration, look in period 3 and group XVI, and that is ...S, sulfur.
Zero. Calcium has two electrons in its 4s sublevel, and none in the 3d sublevel. The 3d sublevel doesn't start filling until after the 4s sublevel is filled.
Aufbau says that the sublevels fill 1s2, 2s2, 2p6. That would mean that you must have filled 1 and 2 s (=4) and 3 more. Last I checked, 3 + 4 = 7. Which element has 7 electrons? I'll give you a hint: its atomic number is 7. Another hint: its symbol is N.
That varies, element #3 will have 3, element 4 will have 4, etc. However, they all have 2 valence electrons.
The 4f sublevel can hold a maximum of 14 electrons.
4 is the number of electrons in that sublevel.
Boron has 3 valence electrons.Boron has 3 valence electrons.