Give the meaning of the term electronegativity 1 mark The ability of an element to attract a pair of electrons in a covalent bond

Ions of two isotopes of iron are 53Fe2+ 56Fe2+

Which statement is correct?

- the ions of both the isotopes have configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d6

- the ions of both the isotopes contains 26 neutrons

- 53Fe2+ has fewer protons that 56Fe2+

- after acceleration to the same kinetic energy 56Fe2+ will move more slowly that 53Fe2+ after acceleration to the sam...