Periodic Table

The discovery of protons helped scientists understand the atomic structure of elements. By knowing that each element has a specific number of protons in its nucleus, scientists were able to organize the elements based on their atomic number, which led to the development of the periodic table. This organization revealed patterns in the properties of elements and facilitated the prediction of properties of undiscovered elements.

Copernicium is a synthetic element that is predicted to be a solid at room temperature based on its position on the periodic table. However, due to its extremely short half-life and limited availability, its physical state at room temperature has not been experimentally confirmed.

noble gases are those gases which dont react with anything. they are also called inert gases. oxygen is not one of them because it does react; infact, all the burning processes cant take place without oxygen.

Elements 94-102 were discovered by a team led by Albert Ghiorso at the Lawrence Berkeley National Laboratory in California. They were synthesized by bombarding heavy target nuclei with accelerated light ions.

Periods in the periodic table tell you the number of electron shells an element has. As you move across a period from left to right, the number of protons, electrons, and valence electrons increases by one, resulting in elements with similar chemical properties being grouped together.

As you move from left to right across the periodic table, the number of valence electrons increases by one at a time. This increase results in a higher effective nuclear charge, which leads to increased attraction between the nucleus and the electrons. This can affect the reactivity and chemical properties of the elements in that period.

Fluorine is a halogen gas. 9 is the atomic number.

Look at the atomic mass of the element.

Round the atomic mass to the nearest whole number, and subtract the number of protons present in the nucleus (the atomic number).

The nucleus of the atom is made of protons and neutrons, so ideally, one can subtract the number of protons or neutrons to get the number of neutrons or protons.

So, Lithium would have 4 neutrons, Hydrogen would only have a proton, and Iron has 30 neutrons.

Of course, it depends, also, on the isotope of the element, which varies with the number of neutrons. So, carbon-14 would have 8 neutrons and 6 protons, while regular carbon would have 6 protons and 6 neutrons.

It signify the group of the element. For example, the first group is called alkali metals. When it is moving from left to right of the periodic table, the atomic radius decreases, the ionization energy increases, and the electronegativity increases.

Dmitri Mendeleev did not have a daughter. He had two daughters, Olga and Lyubov, with his first wife Feozva.

Promethium is the element that is naturally found on Earth but is labeled as a laboratory-made element on the periodic table. Although traces of promethium have been found in uranium ores, it is primarily produced artificially through nuclear reactions.

each row in the Periodic Table is called a period.

The letter "N" does not correspond to an element on the periodic table. Each element is represented by a unique symbol composed of one or two letters. For example, nitrogen is represented by the symbol "N."

The second ionization energy of Group 1 elements is greater because after losing one electron, the remaining electron is held more tightly by the nucleus due to the higher effective nuclear charge, making it more difficult to remove. In contrast, the first ionization energy is lower because the outer electron is farther from the nucleus and experiences less attraction.

Iodine from the greek word - ιώδες or (iodes)

Copper and iron are two metals that can react with aluminum to form corrosion known as galvanic corrosion. This occurs when aluminum comes into contact with these metals in the presence of an electrolyte, resulting in the deterioration of the aluminum surface.

A culture medium composed of carbon source, nitrogen source and minerals was sterilized at 120° for 15 minutes, inoculated with strains of the genus Streptococcus and then cultivated at 35° C for 72 hours under aeration and agitation. Subsequent to the cultivation, the resultant was subjected to water-washing and sieving to obtain crude glucan. The crude glucan was then dissolved in NaOH solution and centrifuged. The recovered filtrate was neutralized with HCl and then the insolubilized glucan was collected by centrifugation. The collected glucan was washed with water thoroughly until no chloride ion was detected in the waste water and then dried to form white purified glucan powder. A culture medium composed of carbon source, nitrogen source and minerals was sterilized at 120° for 15 minutes, inoculated with strains of the genus Streptococcus and then cultivated at 35° C for 72 hours under aeration and agitation. Subsequent to the cultivation, the resultant was subjected to water-washing and sieving to obtain crude glucan. The crude glucan was then dissolved in NaOH solution and centrifuged. The recovered filtrate was neutralized with HCl and then the insolubilized glucan was collected by centrifugation. The collected glucan was washed with water thoroughly until no chloride ion was detected in the waste water and then dried to form white purified glucan powder.

Dmitri Mendeleev's periodic table was published in a Russian chemistry journal called "Journal of the Russian Chemical Society" in 1869. It was presented as a table of the elements organized by atomic weight and properties, with gaps left for undiscovered elements.

The discovery of undiscovered elements with properties predicted by Mendeleev's periodic table (like gallium, germanium, and scandium) confirmed the accuracy of his organization. These elements filled gaps in the periodic table and established a pattern of periodicity that supported Mendeleev's initial insights.

Periodic monitoring allows for the ongoing assessment and evaluation of a situation, system, or process over time to ensure that it remains on track and meets its objectives. It helps to identify any deviations from the desired outcome and provides an opportunity to implement corrective actions or adjustments as necessary.

An atom of chlorine has 17 protons.

If hydrogen had a neutron, it wouldn't be hydrogen; it would be deuterium. If it had two neutrons, it would be tritium.

The pit ("core") in the primary of a two-stage thermonuclear weapon (or by itself in a single stage weapon) is a sphere or ovoid (hollow in modern weapons) made of a fissile material such as plutonium (usually) or uranium (less frequently). They are usually alloyed and plated with some other metal (with plutonium, the plutonium is usually alloyed with gallium and plated with nickel or gold)to stabilise them. They are frequently hollow but there is a pit tube to inject tritium or tritium / deuterium gas mixture into the core to boost the primary and adjust the yield of the weapon.

Some weapons contain a layer of a neutron reflecting material such as beryllium surrounding the pit or bonded to it. The pit may also be bare in certain compact linear implosion weapons.

Very old-style nuclear weapons had a pusher just outside the reflector made of aluminum or depleted uranium.

The secondaries of two-stage weapons (thermonuclear) also contain Lithium-6 deuteride as the source of deuterium and tritium for the fusion fuel during the ablative implosion of the secondary. There is a plutonium "spark plug" (it's a long hollow cylinder of plutonium, or a sphere in more modern compact weapons like the W87 or W88) inside and an outside layer made of lead or depleted uranium to compress the fusion fuel and the spark plug.

A Union of people or groups is called an alliance. This term typically refers to a formal agreement or partnership between parties with shared interests or goals.

Elements in the same column of the periodic table are called "groups" or "families". They share similar chemical properties due to having the same number of valence electrons, which influences their reactivity and behavior.