Question

What quality differentiates hydrogen (H) from the other elements in group 1, the alkali metals?(1 point)
Responses

It has more than one valence electron.

It is not very reactive.

It is a non-metal.

It is found by itself in nature.

Answer 1

what is the correct answer

Answer 2

On which atomic property proposed by Henry Moseley is the current periodic table of the elements based?(1 point)
Responses

electric charge

atomic weight

atomic number

nucleus size

Answer 3

The quality that differentiates hydrogen (H) from the other elements in group 1, the alkali metals, is that it is a non-metal.

Hydrogen is unique in the periodic table for its properties, which are not typical of the other group 1 elements that are all metals (such as lithium, sodium, potassium, etc.) and are much more reactive in their metallic state. While hydrogen does share the characteristic of having one valence electron like the alkali metals, its non-metallic nature sets it apart from them in both chemical and physical properties.

Answer 4

The correct answer is:

It is a non-metal.

This is what differentiates hydrogen (H) from the other elements in Group 1, the alkali metals, which are all metals.

Answer 5

The current periodic table of the elements is based on the atomic property proposed by Henry Moseley, which is:

atomic number

Moseley's work demonstrated that the atomic number, which is the number of protons in an atom's nucleus, provided a more accurate organization of the elements than atomic weight, which had been used previously.