constituents of the atom

Question 1

nuclide notation - proton number, Z

Answer 1

proton number (atomic number),Z, number of protons in a nucleus (in a neutral atom, also number of electrons)

Question 2

nuclide notation - nucleon number

Answer 2

nucleon number (mass number), A, number of neutrons + number of protons (represents mass as electrons are light)

Question 3

nuclide notation

Answer 3

• top number, A
• bottom number, Z
  neutrons= A-Z
  protons= Z
  electrons=Z

Question 4

SPECIFIC CHARGE

Answer 4

:the charge per unit mass (C kg^-1)

charge (C)/ mass (kg)

Question 5

charge of a nucleus

Answer 5

charge on a nucleus= relative charge (Z) x charge on a proton (1.60x10^-19C)

Question 6

mass of a nucleus

Answer 6

mass of a nucleus= relative atomic mass (A) x mass of atomic mass unit (1.661x10^-27kg)

Question 7

mass and charge of ions

Answer 7

charge= relative charge of the ion x charge on an electron (1.60x10^-19C)
mass is same as nucleus