The components of substances that are ______ separate when the substance is placed in water.Multiple choice question.radioactiveionically boundcovalently bound

The correct answer is "ionically bound".

Here's why:

1. Radioactive substances: Radioactivity does not have a direct relationship with the ability of a substance to dissolve in water. It's a property of certain elements or isotopes that have unstable nuclei, but it doesn't determine how they interact with water.

2. Ionically bound substances: These are made up of positive and negative ions held together by ionic bonds. When placed in water, these substances often dissolve as the water molecules interact with the ions and pull them apart. This is why many salts, which are ionically bound, dissolve in water.

3. Covalently bound substances: These are made up of atoms that share electrons. Whether they dissolve in water depends on the specific substance. Many covalently bound substances do not dissolve in water because water is a polar solvent and cannot interact effectively with the shared electrons in covalent bonds.

So, the substances that separate when placed in water are typically those that are ionically bound.