Question

question 2 (1 point) listen which of the following has been stated correctly? 1) ionic bonds are formed only between metal and non - metal 2) forces of energy of energy that hold two or more atoms together and make them function as one unit are called electron affinity 3) br - ion will have the electronic configuration of ar 4) k+ ion will have the electronic configuration of kr

Explanation:

1. Ionic bonds can also form between poly - atomic ions where non - metal atoms are part of the poly - atomic ion, so this is incorrect.
2. The forces that hold two or more atoms together and make them function as one unit are chemical bonds, not electron affinity. Electron affinity is the energy change when an electron is added to a neutral atom in the gaseous state. So this is incorrect.
3. Bromine (Br) has an atomic number of 35. The Br⁻ ion has 36 electrons, which is the same as the number of electrons in argon (Ar) (atomic number 18). So the electronic configuration of Br⁻ is the same as that of Ar. This is correct.
4. Potassium (K) has an atomic number of 19. The K⁺ ion has 18 electrons, which is the same as the number of electrons in argon (Ar), not krypton (Kr) (atomic number 36). So this is incorrect.

Answer:

1. Br⁻ ion will have the electronic configuration of Ar