0
Periodic Table
The Periodic Table is a tabular arrangement of the elements in increasing order oftheir atomic numbers, so that elements with similar properties are in the same column. There are 18 columns, called groups, and seven rows, which are called periods, in the modern periodic table. Questions about the Periodic Table: its history and creation, trends, groups/families, and periods are asked in our Periodic Table category.
11,356 Questions
How does atomic radii increase or decrease in the table?
Atomic radii generally increase from top to bottom within a group (with more electron shells) and decrease from left to right across a period (due to increasing nuclear charge). This trend is influenced by the balance between the increasing positive nuclear charge and the increasing number of electron shells, which can shield the outer electrons from the nucleus.
What element of the periodic table is unusual?
Niobium
A:Each element in the periodic table is unique in its own way.Hydrogen is the lightest of all elements. It is also the only element that has no neutrons in the most common isotope. Furthermore, it is commonly found in ionic form where it is stripped of all electrons where it exists as a single proton. When bonded to carbon, it can also make a "Hydrogen Bond" where it exhibits an amount of stickiness that is neither attributable to ionic or covalent bonding. When bonded to oxygen (and other elements), it has aspects of both ionic and covalent bonds.
Mercury is the heaviest element to be found in liquid state at room temperature, and the only metal to be a liquid at room temperature.
Carbon makes 4 bonds, and can bond to itself in single, double, or triple bonds. When it has 4 bonds, there are no unshared electrons, so it can make many non polar molecules. It can make a dissociative bond in benzene and graphite which is highly electrically conductive.
What is the molecular formula HOH classified as?
If you mean H-O-H where it is 2 hydrogens bonded with one oxygen, then its classified as water. H2O.
What is the family of caesium?
The family of caesium on the periodic table is the alkali metal family, which also includes lithium, sodium, potassium, rubidium, and francium. Alkali metals share similar properties such as being highly reactive and having a single electron in their outermost shell.
What elements are found in staples?
Staples are typically made of metal, such as steel or stainless steel. They may also have a protective coating to prevent rusting or other damage. In some cases, staples may be made of plastic or other materials for specialized applications.
Who contributed to the periodic table?
The periodic table was created by Russian chemist Dmitri Mendeleev in 1869. Mendeleev organized the elements based on their properties and predicted the existence of undiscovered elements. Over time, other scientists like Henry Moseley made contributions to improve and expand upon the periodic table.
Rhenium was discovered in 1925 by German scientists Ida Noddack, Walter Noddack, and Otto Berg while they were studying a sample of platinum ore. They were able to isolate the new element and named it after the river Rhine in Germany.
Is there more metallic elements on the periodic table?
Yes, there are more metallic elements on the periodic table compared to nonmetallic elements. Metallic elements are located on the left and center of the periodic table, while nonmetallic elements are mainly found on the right side. About 70% of the elements on the periodic table are metals.
Periods go across the periodic table.
Groups go down.
How are the elements arrange in the periodic table?
Elements are arranged on the Periodic Table in the order of the atomic number, in groups and periods.
How do most periodic tables differentiate between metals and nonmetals?
Most periodic tables differentiate between metals and nonmetals by placing the metals on the left and in the middle of the table, and the nonmetals on the right. The dividing line between metals and nonmetals is often marked by a zigzag line that separates the two categories, with elements to the left being metals and elements to the right being nonmetals.
Hydrogen is a nonmetal yet it is positioned in group 1 on the periodic table because?
Hydrogen is positioned in group 1 on the periodic table because it has one electron in its outer shell, similar to the alkali metals in that group. However, its properties are distinct from the typical alkali metals due to its unique characteristics as a nonmetal.
What element on the periodic table is similar in properties to arsenic?
Antimony is an element on the periodic table that is similar in properties to arsenic. Both elements belong to Group 15 (pentels) and share chemical similarities due to their shared column on the periodic table.
As you move down a column in the periodic table, the number of electron shells increases. Each new shell added increases the atomic size because the outermost electrons are farther from the nucleus, leading to a larger atomic radius. Additionally, the increasing number of protons and electrons in the nucleus increases the overall size of the atom.
Formula Unit for Potassium Sulfide?
The formula unit for potassium sulfide is K2S. It consists of two potassium ions (K+) and one sulfide ion (S2-).
What does the atomic number of an element refer to?
The atomic number of an element refers to the number of protons.
What type of ion will the element in period 4 group 5 form on the periodic table?
The element in period 4 group 5 (also known as Group 15) will typically form an ion with a 3- charge, known as a nitride ion. This is because elements in this group tend to gain three electrons to achieve a stable electron configuration.
What is the noble gas configuration of sulfur?
The noble gas configuration of sulfur is [Ne]3s2 3p4. It represents the electron configuration of sulfur when it has achieved a stable electronic configuration similar to the nearest noble gas, neon.
Why is francium the most explosive element on the periodic table?
Francium, with atomic number 87, does not have the highest atomic number. When it was discovered, in 1939, scientists already knew of five elements with higher atomic numbers: radium (88), actinium (89), thorium (90), protactinium (91) and uranium (92). By the end of 2015, the highest atomic number was 118 - for ununoctium.
How many electons are contianed in the outer shell of each element in group 1?
Elements in group 1 have 1 electron in their outer shell. This single electron gives them a valency of 1 and makes them highly reactive.
What elements are in the nobel gas group on the periodic table?
The noble gas group on the periodic table includes helium, neon, argon, krypton, xenon, and radon. These elements are known for their stability and reluctance to bond with other elements due to having a full outer electron shell.
What fraction of a radioactive sample remains after three half lives?
Not sure what you mean by "had-lives". After 3 half lives, approx 1/8 would remain.
What is the seventh element on the table of elements?
The seventh element on the periodic table is Nitrogen, with the symbol N and atomic number 7. It is a non-metal that is essential for all living organisms and is commonly found in the Earth's atmosphere.
