Question

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms?

A It is a negative ion that has one less valence electron than a neutral bromine atom.
B It is a positive ion that has one less valence electron than a neutral bromine atom.
C It is a negative ion that has one more valence electron than a neutral bromine atom.
D It is a positive ion that has one more valence electron than a neutral bromine atom.

Answer 1

Answer;

C. It is a negative ion that has one more valence electron than a neutral bromine atom.

Explanation;

• Potassium atom and a bromine atom may form a chemical bond called ionic bond. Ionic bond is formed between a metal and a non-metal and involves the transfer of electrons from one atom to another,
• During the formation of an ionic bond the metal atom looses electrons to form a positively charged ion called a cation, and the non-metal gains electrons to form a negatively charged ion called ion.
• In this case, a neutral potassium atom with 19 electrons looses 1 electron to form a potassium cation with 18 electrons. On the other hand, a neutral bromine atom with 35 electrons gains 1 electron to form an anion (negatively charged ion) with 36 electrons.

Answer 2

Correct answer choice is :

C) It is a negative ion that has one more valence electron than a neutral bromine atom.

Step-by-step explanation:

A bromide is a synthetic composite including a bromide ion or ligand. Potassium bromide (KBr) is a salt, usually selected as an anticonvulsant and a drug in the late 19th and early 20th centuries, with over the stand value increasing to 1975 in the US. Potassium bromide is applied as a veterinary drug, as an antiepileptic medicine for dogs.