Periodic Table

Nonmetals are elements that are brittle and dull.

The boiling points of the components are different, so when the liquid mixture of air is heated to a certain temperature, the component with a boiling point lower than this temperature will boil off and separate.

Any man-made element was named after a today country.

Ironing is the most common method used to take creases out of clothes. The heat from the iron helps to smooth out the fabric, removing wrinkles and creases. Additionally, using a steamer can also be effective in removing creases from clothes without the need for an iron.

The factor that determines the number of elements in a period is the number of electrons that can be fitted into the orbitals (shells, orbits). The first two elements (Hydrogen and Helium) have one and two electrons, respectively. They fit into the first orbital which is closer to the nucleus than other orbitals.

Because this orbital is so small, if you tried to put more than 2 electrons in it, the electromagnetic repulsions between electrons would push the extra electrons out of the first orbital. Only two can ever fit and so only elements can be in period 1.

The second orbital is further from the nucleus and so bigger. Therefore, the electrons in it are not as close to each other. The repulsive force is not as great and 8 electrons can be accomodated. Therefore, the next 8 elements ( Lithium, Berylium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon) all fit into period 2.

This answer is adequate for most year 11 students. For Year 12/13, You need to consider the shape of the orbitals. Period one has only one s-orbital which accepts two electrons of different "spin". Period 2 has an s-orbital and three p-orbitals at right angle to each other. These can accept two electrons each, of opposite "spin", giving a total of 8.

Generally it decreases. There are a few exceptions: the noble gases tend to be quite a bit bigger than the corresponding halogens, and there's a smaller bump as you go from d-block elements to p-block elements.

Because U is the first letter of the name uranium.

The periodic table organized elements based on their properties, allowing scientists to identify gaps in the table where new elements might exist. By examining the patterns in elemental properties, such as atomic number and electron configuration, scientists could predict the properties of undiscovered elements and guide their search for these elements. This helped in anticipating the existence and properties of elements before they were officially discovered.

Ununtrium belongs to the group of elements known as the transactinides. These elements are part of the periodic table's seventh period and are characterized by their high atomic numbers and unstable radioactive properties.

The chemical symbol of einsteinium is Es.

That's tungsten. Wikipedia has more in their post on this amazing metal. A link to it is below.

Neon was discovered on November 18, 1898 by Sir William Ramsay and Morris Travers.

No, AlBr3 is not a polyatomic ion. It is an ionic compound formed by the combination of aluminum (Al) and bromine (Br) atoms in a 1:3 ratio. Polyatomic ions are groups of atoms that carry a charge and act as a single unit in chemical reactions, like sulfate (SO4) or nitrate (NO3).

Elements in a row on the periodic table are called periods. They represent the number of electron shells an element's atoms have. Each period corresponds to the energy level of the electrons in an element's atoms.

Tinplate is non ferrous, as it does not contain any iron.

H2Cr is the chemical formula for dihydrogen chromate, which is a chemical compound. It is a source of the chromate ion (CrO4^-2) and is commonly used in various chemical reactions and industrial processes.

protons,neutrons,electrons, and the element name

Alright so you begin with what you need, this isotope of Protactinium has 234 nucleons, its atomic number is 91, in Beta decay we release an electron, which has no nucleons (protons and neutrons) and an atomic number of -1 so when we take out -1 from 91, so 91 - -1 we get 92, which is of course Uranium, this particular isotope has 234 nucleons, now, to show where it has gone, write the electron in, and add a antineutrino aswell, heres how mine looks.

Pa23491 ---> U23491 + e0-1 + antineutrino (a v with a little line above it)

Hope this helps :)

The chemical formula KOH stands for potassium hydroxide. It is a strong base commonly used in industry and laboratory settings.

You may be referring to the elements whose symbols do not match their names. Such symbols refer to names for those elements (or something related) in other languages.

Examples:

Au (gold) comes from the Latin word aurum

W (tungsten) comes form the Swedish word wolfram. Tungsten is still sometimes called wolfram.

Na (sodium) comes from the Latin word natrium which itself may come from the Egyptian word natron. Natrium is the modern German word for sodium.

The columns going up and down on the periodic table are called "groups" or "families." Each group/family contains elements with similar chemical properties due to the same number of electrons in their outer shell.

Polonium is located in Group 16 (VIA) and in Period 6.

Formula: Mn3N4

Yes, Ne 3s2p3 represents the electron configuration of phosphorus, not a noble gas distribution. Phosphorus has 15 electrons, with the electron configuration [Ne] 3s2 3p3, indicating that it has the noble gas core of neon with additional electrons in the 3s and 3p orbitals.

Since Oxygen has an ion charge of -2 & Copper has a 2 as a subscript, it means that Copper's ion charge will be +1.

Cu2O = Copper (I) Oxide