Question

2. This means that there position in the modern periodic table is​

Answer 1

Answer:

Atomic number and protons

The atomic number of an element was originally just its position on the periodic table. ... In the periodic table the elements are arranged into: horizontal rows, called periods , in order of increasing atomic number. vertical columns, called groups , where the elements have similar properties.

Answer 2

Explanation:

The number of electrons in the outermost shell of alkali metals is 1. b. Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in group2.