The trait that characterizes the alkali metals is "the lowest first ionization energy values of the elements in each period".

Here's why:

1. Alkali metals do not have a very high melting point. In fact, they have low melting points.

2. Alkali metals do not exist as diatomic molecules. They are usually found in ionic compounds.

3. Alkali metals do not generally form -2 anions. They typically form +1 cations.

4. Alkali metals do have the lowest first ionization energy values of the elements in each period. This is because they have only one electron in their outermost shell, which is relatively easy to remove.

5. Alkali metals do not have the smallest atom in each period. In fact, they have some of the largest atomic radii of the elements in their respective periods.

Question

The trait that characterizes the alkali metals is "the lowest first ionization energy values of the elements in each period".

Here's why:

1. Alkali metals do not have a very high melting point. In fact, they have low melting points.

2. Alkali metals do not exist as diatomic molecules. They are usually found in ionic compounds.

3. Alkali metals do not generally form -2 anions. They typically form +1 cations.

4. Alkali metals do have the lowest first ionization energy values of the elements in each period. This is because they have only one electron in their outermost shell, which is relatively easy to remove.

5. Alkali metals do not have the smallest atom in each period. In fact, they have some of the largest atomic radii of the elements in their respective periods.

Knowee AI · Accepted Answer

The trait that characterizes the alkali metals is "the lowest first ionization energy values of the elements in each period".

Here's why:

1. Alkali metals do not have a very high melting point. In fact, they have low melting points.

2. Alkali metals do not exist as diatomic molecules. They are usually found in ionic compounds.

3. Alkali metals do not generally form -2 anions. They typically form +1 cations.

4. Alkali metals do have the lowest first ionization energy values of the elements in each period. This is because they have only one electron in their outermost shell, which is relatively easy to remove.

5. Alkali metals do not have the smallest atom in each period. In fact, they have some of the largest atomic radii of the elements in their respective periods.

Which of the following traits characterises the alkali metals?Group of answer choicesvery high melting pointexistence as diatomic moleculesgenerally form -2 anionsthe lowest first ionisation energy values of the elements in each periodthe smallest atom in each period

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