Question

Which one of the following properties of alkali metals
increases in magnitude as the atomic number rises ?
(a) Ionic radius (b) Melting point
(c) Electronegativity (d) First ionization energy

Answer 1

Answer:

ionic radius is increases when atomic number is increases number of shells increases

Answer 2

Property of alkali metals  increases in magnitude as the atomic number rises ionic radius increases.

Explanation:

• The ionic radius of alkali metal increases as the atomic number increases when we move up to down because the group moved downwards, there is a raise in the number of shells and therefore, ionic radii increases.
• In the periodic table column 1A is the alkali metals such as, lithium, hydrogen, sodium, rubidium, potassium, francium and cesium. These metals unified, the electrons outermost layer has one electrons.
• Alkali metals are soft, silvery, and less dense. It can be cutted with a cesium and butter knife. Its melting point is low.
• It takes some energy to remove that outermost electron from an alkali metal. Thus, alkali metals easily lose their outermost electron to become a +1 ion. This happens so often that it is rare to find a sample of an alkali metal with all of its electrons; most alkali metals occur in their ionic +1 form.

To learn more;

1. https://brainly.in/question/3138542
2. https://brainly.in/question/3639820