(a) Where is the nucleus of an atom situated ?
(b) What are orbits or shells of an atom ?
(c)What are isotopes ? How does the existence of isotopes contradict Dalton's atomic theory ?
(a) Where is the nucleus of an atom situated ?
(b) What are orbits or shells of an atom ?
(c)What are isotopes ? How does the existence of isotopes contradict Dalton's atomic theory ?
(a)
1. The centrally located nucleus
2. The outer circular orbits.
The nucleus is a centrally located positively charged mass.
b-
The circular orbits (shell present) in the space available around the nucleus on which electrons
revolve are called orbits or shells of an atom
c)The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. The existence of isotopes contradicts part of Dalton's original atomic theorybecause he said all atoms of a given element are identical have the same mass size and chemical properties.
(a)
1. The centrally located nucleus
2. The outer circular orbits.
The nucleus is a centrally located positively charged mass.
b-
The circular orbits (shell present) in the space available around the nucleus on which electrons
revolve are called orbits or shells of an atom
c)The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. The existence of isotopes contradicts part of Dalton's original atomic theorybecause he said all atoms of a given element are identical have the same mass size and chemical properties.
