Periodic Table

The atomic radius does not increase as you progress from left to right on the periodic table. Instead, it generally decreases due to increasing nuclear charge pulling electrons closer to the nucleus.

Example when they two molecules of water that is 2H2O now this is a compound formed by two atoms or elements which proves that a molecule is composed of a compound that is the bonding of an atom to another atom .

All molecules are made up of atoms. The type and arrangement of atoms in a molecule determine its properties and behavior.

The tendency to gain electrons generally decreases as you go down the 16th group of the periodic table, also known as the chalcogens. This is due to the increasing atomic size and shielding effect of additional electron shells as you move down the group, which decreases the effective nuclear charge felt by the outermost electrons, making it more difficult to attract additional electrons.

Li2O2 is lithium peroxide, a compound that forms when lithium metal reacts with oxygen. It is a white solid that is used in lithium-air batteries as an electrode material due to its ability to store and release oxygen during the battery's operation.

Fluorine is a gas at room temperature and it looks pale yellow.

Iron does not have a closed shell configuration because it has incompletely filled d-orbitals in its electron configuration. In the case of iron, the electrons in the 3d orbitals prevent it from achieving a closed shell configuration.

Curium is a radioactive element that is highly reactive and can react with water to produce hydrogen gas. However, due to its radioactivity and potential health hazards, curium is not commonly used in chemical reactions involving water.

The seven horizontal rows of the table are called periods. Elements in the same row have the same number of electron shells, which determines their chemical properties.

Elements in the same group on the periodic table have similar chemical properties because they have the same number of valence electrons. This determines how they interact with other elements to form compounds, resulting in similar chemical behavior within the group.

Copper's atomic number is 29.

Chlorine is commonly used as an element to clean and disinfect water in pools, as well as surfaces in households and healthcare settings. Its oxidizing properties help to kill bacteria and viruses.

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Oxygen was discovered by Swedish chemist Carl Wilhelm Scheele in the 18th century. This discovery was later independently confirmed by Joseph Priestley, an English chemist.

John Dalton studied hydrogen and oxygen, recognizing them as elements during his research on the nature of matter and atomic theory.

Actinium is a transition metal, solid, very radioactive, artificial.

Americium react with the majority of non metals and also with inorganic acids. The Pauling electronegativity is 1,5. Valences of americium are between 2 an 7.

- melting point: 1176 0C

- boiling point: 2 607 0C

- density: 12 g/cm3

- heat of fusion: 14,39 kJ/mol

- therrmal conductivity: 10 W/m.K

- electrical resistivity: 0,69 microohm.m

- ionization energy (first): 578 kJ/mol

- covalent radius: approx. 180 pm

- molar heat capacity: 62,7 J.mol/K

- is paramagnetic

- electron configuration: [Rn]5f7.7s2

A periodic table displays all known elements arranged by their atomic number, electron configuration, and recurring chemical properties. It provides valuable information such as element names, symbols, atomic masses, and group/family classifications. Additionally, the table helps scientists predict the behavior and properties of elements based on their position.

The letter "i" does not represent any specific element on the periodic table. The elements on the periodic table are typically represented by one or two letter abbreviations.

Having two different naturally occurring isotopes of an element provides diversity in their properties. This allows for a wider range of applications, such as different forms of carbon being used in dating techniques (carbon-12 and carbon-14). Additionally, the presence of multiple isotopes can provide valuable information about the origin and history of a material.

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in a period size decreases from left to right and hence electrons are more tightly held to the nucleus. so electron gain enthalpy increases across a period .

down the period size increases and thus in general electron gain enthalpy decreses .

Aluminum has 13 protons and approximately 14 neutrons.

No, mercury is not a semiconductor. It is a metallic element that is a liquid at room temperature. Semiconductor materials are distinct from metallic elements like mercury and include materials like silicon and germanium.

the periodic table is organized in a few ways. The elements in a column (up to down) are placed like that because they have the same amount of valence electrons (electrons in outer shell). The periodic table is also divided with metals on the right and covering most of the middle, metaloids to the right and gases to the far right of the table. Lastly because of Aluminum's physical and chemical properties it is with the other metals in about the center of the periodic table.

Yttrium is in group 3 on the periodic table, also known as the scandium group.