Answer:
d. fluorine
Step-by-step explanation:
With the name of the period, Chemistry distinguishes each of the seven horizontal lines, displayed from top to bottom, which make up the Periodic Table. They are also numbered from 1 to 7, which happens not only in their correlative order, but because the number of each period indicates the number of main energy level that the electrons of the elements, belonging to a specific period, They begin to fill. According to the current distribution and conformation of this chemical classification chart, seven different types of periods can be found .
Period 2
An element belongs to Period 2 when it is located in the 2nd row of the Periodic Table.
Period 2 indicates that the atom has electrons distributed in two energy levels.
There are 8 elements belonging to Period 2 are:
• Lithium (Z = 3): belonging to Group IA, it is a soft alkaline metal, which oxidizes easily in water or air.
• Beryllium (Z = 4): belongs to Group IIA, it is an alkaline earth metal, light and hard but at the same time it is also brittle.
• Boron (Z = 5): belongs to Group IIIA, it is a blackish-looking metalloid that has semiconductor properties.
• Carbon (Z = 6): it belongs to the IVA Group, it is a nonmetal of variable appearance and properties according to its atoms at the molecular level.
• Nitrogen (Z = 7): belongs to the VA Group, it is a nonmetal that has a high electronegativity and is in the form of a gas at room temperature
• Oxygen (Z = 8): belongs to the VIA Group, it is a nonmetal that is in the form of a gas at room temperature
• Fluorine (Z = 9): belongs to the VIIA Group, is a halogen, is the most electronegative element and is in the form of gas at room temperature
• Neon (Z = 10): it belongs to Group VIIIA, it is a noble gas since it has its last complete electron layer.