Living together. Threekingham, or Threckingham, is both a village and parish 7 miles due south of Sleaford and 11 miles east of Grantham. Swaton parish and Billingborough parish lie to the east, Folkingham parish to the west and Osbournby parish to the north west.iving together. Threekingham, or Threckingham, is both a village and parish 7 miles due south of Sleaford and 11 miles east of Grantham. Swaton parish and Billingborough parish lie to the east, Folkingham parish to the west and Osbournby parish to the north west.
The atomic number of an element is equal to the number of protons in the nucleus of its atom. The atomic number is also known as proton number of the element. Further, in an atom, number of protons is equal to the number of electrons. Hence, atomic number is also equal to the number of electrons in an atom of the element. Thus,
Atomic number and mass number. The atomic number of an atom is the number of protons it contains. All the atoms of a particular element have the same atomic number (number of protons). The atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons. The mass number of an atom is the total number of protons and neutrons it contains.