Calcium will lose two electrons to gain the noble gas configuration of Argon.
loses 2 electrons to achieve a noble gas configuration
Boron must give up 3 electrons in order to achieve a noble-gas electron configuration.
Phosphorus has to gain a total of 3 electrons to achieve a noble gas configuration. You can find this for any non-metal because the last digit of its group number is the number of valence electrons it has. For example Phosphorus has 5 and Sulfur has 6. In order to achieve a noble gas electron configuration, you must have 8 valence electrons, so phosphorus must gain 3.
Other elements can acquire a noble gas configuration by gaining or losing electrons to achieve a full outer electron shell, similar to that of a noble gas. This can be done through forming chemical bonds with other elements or ions in order to stabilize their electron configuration.
Atoms gain, lose or share electrons and try to attain noble gas configuration.
Calcium would need to lose 2 electrons to have 8 valence electrons. This is because calcium has 2 valence electrons in its outer shell, and by losing these 2 electrons, it can achieve a stable octet configuration like the noble gas argon.
nitrogen has 5 valence electrons. It should gain 3 electrons to achieve a noble gas configuration.
loses 2 electrons to achieve a noble gas configuration
Barium has 2 electrons in its outer shell. In order to achieve a noble gas electron configuration it needs to lose these 2 electrons. This will leave it with the same electron configuration as Xenon, a noble gas.
Boron must give up 3 electrons in order to achieve a noble-gas electron configuration.
Two.
Nitrogen has to gain three electrons
Silver (Ag) has 47 electrons. To achieve a pseudo-noble-gas electron configuration, silver would need to lose one electron to achieve a stable electron configuration that resembles a noble gas configuration like argon.
An element that would have to lose three electrons to achieve a noble gas electron configuration is aluminum (Al). Aluminum has 13 electrons, and if it loses three electrons, it would have the same electron configuration as neon (10 electrons), which is a noble gas.
Carbon needs to gain four electrons in order to obtain a noble gas electron configuration, similar to that of neon. This will result in a full valence shell with eight electrons, fulfilling the octet rule.
Phosphorus has to gain a total of 3 electrons to achieve a noble gas configuration. You can find this for any non-metal because the last digit of its group number is the number of valence electrons it has. For example Phosphorus has 5 and Sulfur has 6. In order to achieve a noble gas electron configuration, you must have 8 valence electrons, so phosphorus must gain 3.
Nitrogen needs to gain 3 electrons to achieve noble gas electron configuration, similar to the nearest noble gas, which is neon. By gaining 3 electrons, nitrogen would have a full outer shell of 8 electrons, making it more stable.