Periodic Table

Sulfur (S, element number 16) is on the third period of the periodic table.

Electronegativity generally decreases as you go down a group on the periodic table due to the increasing distance between the nucleus and valence electrons, reducing the attractive force. Across a period, electronegativity generally increases due to the increasing nuclear charge, pulling valence electrons closer and increasing their attraction.

Non-reactive elements in the periodic table are typically the noble gases, such as helium, neon, and argon. These elements have a full outer electron shell, making them stable and less likely to form chemical bonds. Reactive elements are those that readily form chemical bonds with other elements, such as the alkali metals (e.g. sodium, potassium) and halogens (e.g. fluorine, chlorine).

Fluorine, chlorine (the symbol is capital C, lowercase L), bromine and iodine are all halogens with similar chemical properties. Elements with similar chemical properties appear in the same columns, called groups, in the periodic table. All of the previous elements are in group 17.

Atoms on the left side of the periodic table tend to lose electrons to achieve a full outer energy level, forming positive ions. These elements are typically metals and exhibit metallic properties such as luster and conductivity. They also tend to form cations in chemical reactions.

4 energy levels with 2, 8, 8, 2 electrons in the energy levels.

Group 2 in the periodic table is commonly known as the "alkaline earth metals." These elements include beryllium, magnesium, calcium, strontium, barium, and radium. They are characterized by their high reactivity and tendency to form alkaline solutions when they react with water.

No. The horizontal rows of the periodic table are called periods. The vertical columns are called groups, and sometimes called families.

Considering also very heavy artificial elements this group doesn't exist.

The percentage composition of a mixture has nothing to do with its homogeneity or otherwise. A mixture is homogeneous if its percentage composition - whatever that is - is the same throughout the mixture.

The family of elements in Group VIIIA 18 is known as the noble gases. They are characterized by their stability due to having a full outer electron shell, making them generally unreactive. The noble gases include helium, neon, argon, krypton, xenon, and radon.

Chlorine is more electronegative than phosphorus. Generally, the trend of the periodic table is that electronegativity increases as you go from left to right, and it decreases as you go down.

Bromine and chlorine are in group VII A, which could also be designated Group 7a, of the narrow form periodic table that was commonly used before 1980. Most chemists now prefer a wide form periodic table, in which these elements are in column 17.

From what I understand, the guy who came up with the periodic table just used trial and error to find a way to chart the elements, the way he arranged them is as close as it gets to fitting a pattern.

Rb is the symbol for the element, rubidium.

Cobalt and nickel. They were placed before expected elements based on increasing atomic mass due to their similar chemical properties, violating Mendeleev's original periodic law.

Astatine, with the symbol At and the atomic number 85, is usually classified at a metalloid, but this is in dispute. It is sometimes classified as a halogen, and possibly a metal. It is still being studied.

Neon is in row 2 of the periodic table of elements.

Iron's family number on the periodic table is 8. This means that iron is part of Group 8, also known as the transition metals.

No, elements are defined by the number of protons they have and the periodic table contains all the elements up to over 100 protons, much past this point they become very unstable and radioactively decay into lighter (less protons in the nucleus) atoms. Elements this heavy do not occur naturally so we would not find them on the moon.

Group two metals are known as alkaline earth metals on the periodic table. This group includes elements such as beryllium, magnesium, calcium, strontium, barium, and radium. They are characterized by their high reactivity and tendency to form 2+ cations.

Atomic number of an element can be found on the periodic table. It is located at the upper left-hand corner of the table.

you will find almost everything about the element in the periodic table like its atomic mass and its atomic number, chemical affinity also its electronegative but you wont find when the element was discovered or weather it is found in free state or oxides in nature

The symbol Uuh in the periodic table stands for Ununhexium, which is the temporary name given to the element with atomic number 116. It is a synthetic element that has not been observed in nature and is highly unstable.