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
Who is the scientisit is credited with the creation of the periodic table?
Dmitri Mendeleev is credited with the creation of the periodic table. He arranged the elements based on their atomic mass and chemical properties, and left gaps for undiscovered elements. His work laid the foundation for our modern understanding of the periodic table.
What element has a mass number of 197?
Hafnium is the element that has a mass number of 179. Its color is silver, its structure is hexagonal, while the number of neutrons is 106.
What are multi atomic elements?
Multi-atomic elements are chemical elements that exist as diatomic molecules in their natural state, meaning they consist of two atoms bonded together. Examples include oxygen (O2), nitrogen (N2), and hydrogen (H2). These molecules are stable due to sharing electrons between the atoms.
Why isn't there an unundecium yet?
Because Ununoctium is the latest element in the table so far, it's half life is less than 1 millisecond and only 3 or 4 atoms have ever been produced. Unundecium is theoretically possible, but barely, not with today's technology
Different person: Also, even if there was, it wouldn't be called unundecium, because that means 'one one ten'. It would be called 'unbinillium' because it means 'one(un)two(bi)zero(nill)'.
Why isn't opal on the periodic table?
The periodic table of elements is only for, well, elements. A diamond is not an element, it is a mineral. An element is a compound or molecule that cannot be broken down into anything smaller, example: hydrogen, oxygen, even gold. Diamond isn't an element therefore it cannot be in the periodic table. It is a compound composed completely of Carbon, an element with atomic number 12. Graphite is also completely composed of Carbon yet is very different to diamond in its physical and chemical properties. i.e diamond is glassy, colourless and hard, graphite is dark grey/black and is soft. This has to do with the arrangement of the carbon atoms in each compound respectively. it is not a basic element. it is a byproduct of one.
because diamond is a covalently bonded lattice of carbon atoms.
the periodic table only lists elements and not compounds so diamond is not in this, carbon (the substance diamond is made from) is.
What is the first element of the actinides?
The first element in the actinide series is actinium , a chemical element in the periodic table that has the symbol Ac and atomic number 89.
The actinide (or actinoid) series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table , with atomic numbers 89-103.
The actinides get their name from the first element in the series , actinium.
What are Dmitri Mendeleev's sibling's names?
He had around 17 siblings (though it’s debated), and though a number of them we still don’t know, 8 of the 14 surviving siblings and of the 17 overall siblings are known. Do correct me if I am wrong, for I am not one to purposefully spread misinformation; on that note I definitely do not know the order of siblings off the top of my head but here they are anyways: Vasily, Olga, Vladimir, Masha, Pavel, Ivan, Maria and Anna.
What group of elements on the periodic table do not combine readily with other elements?
its not a group but its called a compound. When two elements are combined it becomes a compound. Answer: Group 18, the noble or inert gasses, won't readily react/combine with other elements or if so with great difficulty. -Blue
What chemical is similar to uranium?
Plutonium is a chemical element that is similar to uranium in terms of its radioactive properties and use in nuclear reactions. Both elements can undergo fission reactions and are used in nuclear power generation and nuclear weapons.
What is 3 quarters of the 90 naturally occurring elements?
3 quarters of the 90 naturally occurring elements are called metals.
Is there a symbol Tn in the periodic table?
What is similar for elements located next to one another on the periodic table?
Elements located next to one another on the periodic table tend to have similar chemical properties because they share the same number of valence electrons. This leads to similar reactivity and bonding behavior. They may also have comparable atomic sizes and electronegativities.
What is the symbol of rust in the periodic table?
rust is oxidized iron
basically that means FeO
or Iron Oxide.
this occurs on steel, as steel is iron and carbon (amongst other things)
it is the Iron that oxidizes to make the rust.
Nickel is a hard, smooth, and dense metal. It has a cool sensation to the touch at room temperature.
the only element with a mass number of 22 is sodium (Na) which has an atomic number of 11. This is because the atomic number only represents the number of protons in the nucleus, while the mass number represents the number of protons and neutrons in the nucleus.
Nitrogen, Oxgen and all the halogens (Fluorine, Chlorine, Bromine, Iodine and Astatine) exist as a diatomic molcules.
What is the heaviest usable metal?
Bismuth (Bi) is the heaviest nonradioactive element but the next heaviest is Lead (Pb) and that is much more commonly used.
The heaviest element that is naturally occurring, and also usable, though radioactive, is Uranium (U).
Origin is not an element in the traditional sense, but it can refer to the starting point or source from which something begins or arises. In chemistry, elements are substances that cannot be broken down further by chemical means.
Why don't elements in group 8 bond with other elements?
The elements in group 8 of the periodic table are iron (Fe), ruthenium(Ru), osmium(Os), and hassium(Hs). All four of these elements are grouped together because each of their atoms has a full valence shell containing the maximum of 8 electrons. Atoms seek to bond when their outer valance is unstable and has less than 8 electrons. Their goal is to fill the valance with 8 electrons to become chemically unable to bond or "chemically inert." That is the case with the group 8 elements. They have a complete or closed shell and that is why they do not bond with other elements.
What is an unknown element as a colorless gas at room temperature?
One example of an unknown element that is a colorless gas at room temperature is nitrogen. Nitrogen is a diatomic molecule with the chemical symbol N2. It makes up about 78% of Earth's atmosphere and is commonly used in various industrial applications.
What is the chemical formula of Gallium carbonate?
Ionic gallium takes a 3+ (Ga3+) charge, and the hydroxide ion takes a 1- (OH-) charge. Therefore, the chemical formula (the combination of the ions to form an ionic compound) is Ga(OH)3, which satisfies all the charges. There are several other forms of ionic gallium compounds as well, include Gallium Oxide (Ga2O3) and Gallium Oxide Hydroxide (GaOOH).
Who approves element names and symbols?
The International Union of Pure and Applied Chemistry (IUPAC) approves element names and symbols.
Which period contains the highest amount of nonmetals?
The highest amount of nonmetals can be found in the p-block of the periodic table, specifically in periods 2 and 3. These periods contain elements like oxygen, nitrogen, fluorine, and chlorine, which are all nonmetals.
