Atomic Number: 2
Valence Electrons: 2
Protons: 2
Neutrons: 2
Electrons: 2
Helium is a nonmetal element on the periodic table. It is located in group 8A and period 1. Group 8A is also known as the noble gases, so named because of how little the elements it contains react with the other elements. Helium has the smallest atomic radius and is the most unreactive element on the periodic table. Helium is useful for its non-reactive properties and because it weighs less than air, aloowing whatever contains it to float.
Silicon:
Atomic Number: 14
Valence Electrons: 4
Protons: 14
Neutrons: 14
Electrons: 14
Silicon is a metalloid element on the periodic table. A metalloid is an element that contains both the properties of metals and nonmetals. Silicon is in group 4A and period 3. Silicon is used for its ability to form into fibers, which allow it to be crafted into a plastic that is used in many household items, the most prominent of which is computer chips.
Lithium:
Atomic Number: 3
Valence Electrons: 1
Protons: 3
Neutrons: 3
Electrons: 3
Classification: Metal
Group: 1A, Alkali Metals
Period: 2
Uses: Batteries, treatment of depression
Iodine:
Atomic Number: 53
Valence Electrons: 7
Protons: 53
Neutrons: About 74
Classification: Nonmetal
Group: 7A, Halogens
Period: 5
Uses: Dietary supplement
