Number of electrons in the outermost m shell of an element is 3.find its atomic number.
To find the atomic number of an element based on the number of electrons in its outermost m shell, you can use the periodic table.
Step 1: Identify the group number of the element on the periodic table corresponding to the given number of electrons in the outermost m shell.
In this case, the outermost m shell of the element has 3 electrons. Looking at the periodic table, Group 3 elements usually have 3 valence electrons. Therefore, the element is likely to belong to Group 3.
Step 2: Determine the atomic number of the element based on its position in Group 3.
Group 3 has two subsections: the main group elements and the transition metals. The main group elements have atomic numbers that match their group numbers, while the transition metals have atomic numbers that vary. To find the atomic number of the element, we need to know whether it is a main group element or a transition metal.
Since the question does not specify, let's assume the element belongs to the main group. Thus, based on the group number, the atomic number of the element is 3.
However, if the element belongs to the transition metals, it could have several possibilities within Group 3, such as scandium (Sc) with an atomic number of 21 or yttrium (Y) with an atomic number of 39.
Therefore, without further information, we can conclude that the atomic number of the element is likely 3, but there is also a possibility that it belongs to the transition metals within Group 3.