How many of the following statements are false? I. The group 3A elements are all metals. II...

Question:

How many of the following statements are false?

I. The group 3A elements are all metals.

II Alkaline earth metals react less vigorously with water than do the alkali metals.

III. Salts can consist of hydrogen.

IV. Because Li is the strongest reducing agent of the alkali metals, it reacts most quickly with water of the alkali metals.

The Periodic Table:

In the periodic table, all the known elements are arranged such that it becomes easier to study the properties of the elements and trend in the property with certain parameters of the element. Depending upon the properties, the elements in periodic elements are grouped together to study that particular property...

Answer and Explanation:

I. (false)The 3A group consists of boron (B), Aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Since Boron makes covalent bonds mostly, it is considered to be a metalloid. The rest of the elements are metals.

II. (True) Alkali metals are more reactive than Alkaline earth metals. With water, Alkali metals react to give a stronger base than those of alkaline earth metals

III. (True) The salts of polyprotic acids can form salts with hydrogen. For example: {eq}NaHCO_3 {/eq}

IV. (True) Li is considered to be the strongest reducing agent in alkali metals. It has the highest hydration enthalpy.

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The Periodic Table: Properties of Groups and Periods

from Chemistry 101: General Chemistry

Chapter 3 / Lesson 1
376K

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