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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

What are the names on the periodic table and their names?

The periodic table lists the elements by their names and atomic symbols. For example, hydrogen is represented by the symbol H, and carbon is represented by the symbol C. Each element has a unique name and corresponding symbol on the periodic table.

Who were Dmitri Mendeleev's friends?

The famous ones were William Ramsay, a British scientist whose team was responsible for the isolation and characterization of the 5 (lighter) noble gas elements, and Aleksandr Borodin, the Russian scientist who investigated aldehydes, and who was responsible for much of the systematization of organic chemistry that led Mendeleev to try something similar with the chemistry of the elements. (Borodin was also a noteworthy composer). There was also a connection with Marie Curie through one of her relatives.


How many energy levels does radium have?

Radium, a radioactive element with atomic number 88, has 7 energy levels. These energy levels correspond to the possible orbits of its electrons around the nucleus. The electrons in radium fill these energy levels according to the Aufbau principle, Pauli exclusion principle, and Hund's rule. Each energy level can accommodate a specific number of electrons based on the formula 2n^2, where n represents the principal quantum number of the energy level.

What is the name for AlCl2?

The name for AlCl2 is aluminum chloride. Aluminum chloride is a compound composed of one aluminum atom and two chlorine atoms, resulting in a chemical formula of AlCl2. It is a white or pale yellow solid that is commonly used as a catalyst in organic chemistry reactions.

What does PS stand for on the periodic table?

Oh, dude, PS on the periodic table stands for PostScript. Nah, just kidding! It actually stands for Plumbum, which is the Latin word for lead. So, like, if you were hoping for some cool abbreviation, sorry to disappoint, but hey, at least now you know it's not a secret message from chemists trying to be sneaky.

Which is more reactive group 1 or 2?

Group 1 elements (alkali metals) are more reactive than group 2 elements (alkaline earth metals) because group 1 elements have one valence electron that they readily lose to form a stable 1+ ion, whereas group 2 elements have two valence electrons and are less likely to lose them.

What element is1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2?

The element that has the orbital configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 is Germanium (Ge). It could also be written as [Ar] 4s2 3d10 4p2.

What was Aristotles contributions to the periodic table?

Aristotle did not contribute to the periodic table. The periodic table was developed by Dmitri Mendeleev in the 19th century, organizing elements based on their properties and atomic structure. Aristotle made contributions to philosophy, biology, and logic.

What is 2C12H22O11?

Oh, dude, 2C12H22O11 is just a fancy way of saying sugar. Yeah, like the stuff you put in your coffee or sprinkle on your cereal. So, next time someone asks you what that is, just tell them it's sugar and watch them be like, "Oh, really?"

WHY in the periodic table is Pb the symbol for lead?

The Latin word for lead is "Plumbum", which is where we got the name. Because it's relatively easy to find, we've known about lead for hundreds of years. The original latin name was Plumbum Nigrum, which translates roughly as "soft metal that's black".

Elements on the left side of the periodic table?

Elements on the left side of the Periodic Table are "Alkali Metals". There is also one non-metal element. H(hydrogen)

What is the nuclear equation of nitrogen 13 undergoes beta decay?

Here's your equation for the beta minus decay of carbon-14: 614C => 714N + e- + ve An atom of carbon-14 transforms into an atom of nitrogen-14 here. In carbon-14, a down quark in a neurton becomes an up quark. This change, mediated by the weak interaction or weak force, changes that neutron into a proton. This creates another element, the nitrogen, and an electron is created within the nucleus and then is ejected along with an antineutrion. Use the link below to learn more about beta decay.

How many formula units are in 5.1 grams of TiO2?

You have to start with 5.1 and multiply it by 6.022 x 10^23 (AKA "The Number") then divide it by 236.381- the molar mass of TiO2- and you get 1.2992 or if you have to put it sig figs the answer is 1.3 x 10^22. :)

Most reactive group of nonmetals?

Ah, the most reactive group of nonmetals would be the halogens, my friend. These elements are always eager to form bonds and react with other substances in their quest for stability. Just like how we blend colors on our canvas, these halogens create beautiful reactions in nature that keep the world in balance.

What is the freezing point for technetium?

Technetium does not have a well-defined freezing point as it is a radioactive element with no stable isotopes. However, it is expected to have a freezing point around room temperature due to its position in the periodic table.

What Ha stand for on the periodic table?

humour ace humous ace

ha ha

this is my best shot

How many elements under atomic number 101 have names ending with ium?

Well, darling, elements with names ending in "ium" are usually metals, and they're as common as wrinkles on a raisin. But if we're talking about elements with atomic numbers less than 101, then there are 8 elements with names ending in "ium." So, to answer your question, there are 8 elements under atomic number 101 that have names ending with "ium."

What element has a macromolecular structure similar to carbon?

Silicon is the element that has a macromolecular structure similar to carbon. Both carbon and silicon are in the same group on the periodic table, known as Group 14, and share similar chemical properties. Silicon can form long chains and complex structures similar to carbon, making it a key element in the field of materials science and semiconductor technology.

What is a characteristic of BCNO groups?

They are reactive, but selective with elements that they will bond with. Most bond with oxygen and oxygen bonds with itself. Elements in the same families tend to bond with other elements similarly, but there are no hard and fast rules.

What is the element before silver?

The element before silver in the periodic table is palladium, with atomic number 46. Palladium is a transition metal that belongs to Group 10 and Period 5 of the periodic table. It has similar chemical properties to platinum and is commonly used in catalytic converters, electronics, and jewelry.

What is atoms and molecuse?

Oh, dude, atoms are like those tiny building blocks that make up everything around us. They're like the Legos of the universe, you know? And molecules are just a bunch of atoms hanging out together, forming cool little groups that do all sorts of stuff. So yeah, atoms and molecules are basically the OG squad of the scientific world.

What are the chemical properties of mercury?

Atomic number 80 Atomic mass 200.59 g.mol -1 Electronegativity according to Pauling 1.9 Density13.6 g.cm-3 at 20°C Melting point - 38.9 °C Boiling point 356.6 °C Vanderwaals radius 0.157 nm Ionic radius 0.11 nm (+2) Isotopes 12 Electronic shell[ Xe ] 4f14 5d10 6s2 Energy of first ionisation 1004.6 kJ.mol -1 Energy of second ionisation 1796 kJ.mol -1 Energy of third ionisation 3294 kJ.mol -1 Standard potential + 0.854 V ( Hg2+/ Hg ) Discovered by The ancients

What are the elements with atomic numbers from 58 to 71 called?

The elements with atomic numbers from 58 to 71 are called the lanthanides. They are a group of metallic elements that have similar chemical properties due to their electron configurations. The lanthanides are commonly used in various applications such as in the production of electronic devices and catalysts.