Question

calculate the effective nuclear charge on the last electron of sodium​

Answer 1

ғᴏʀ ᴅᴇᴛᴇʀᴍɪɴɪɴɢ ᴇғғᴇᴄᴛɪᴠᴇ ɴᴜᴄʟᴇᴀʀ ᴄʜᴀʀɢᴇ ᴏɴ sᴏᴅɪᴜᴍ(ɴᴀ), ᴡᴇ ᴀᴘᴘʟʏ sʟᴀᴛᴇʀ's ʀᴜʟᴇs ғᴏʀ ᴄᴀʟᴄᴜʟᴀᴛɪɴɢ sɪɢᴍᴀ ᴀɴᴅ ᴢᴇғғ. ᴛʜᴇsᴇ ʀᴜʟᴇs ᴀʀᴇ ɢɪᴠᴇɴ ʙᴇʟᴏᴡ: ᴀ) ᴇᴀᴄʜ ᴏғ ᴛʜᴇ ʀᴇᴍᴀɪɴɪɴɢ ᴇʟᴇᴄᴛʀᴏɴs ɪɴ ᴛʜᴇ ɴᴛʜ sʜᴇʟʟ ᴍᴀᴋᴇs ᴀ ᴄᴏɴᴛʀɪʙᴜᴛɪᴏɴ ᴏғ 0.35 ᴛᴏ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ sɪɢᴍᴀ. ʙ) ᴇᴀᴄʜ ᴏғ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴs ɪɴ(ɴ - 1) ᴛʜ sʜᴇʟʟ ᴍᴀᴋᴇs ᴀ ᴄᴏɴᴛʀɪʙᴜᴛɪᴏɴ ᴏғ 0.85.