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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 is Benedicts solution used to test?
Presence of starch. Polymers of reducing sugars.
It's used to test for the presence of glucose in a patients urine - a standard test for diabetes.
starch
Benedict's reagent is used as a test for the presence of all monosaccharides, and generally also reducing sugars. These include glucose, galactose, mannose, lactose and maltose. Even more generally, Benedict's test will detect the presence of aldehydes (except aromatic ones), and alpha-hydroxy-ketones, including those that occur in certain ketoses. - wikipedia
What group is the element platinum in?
Platinum is in the group of elements known as the transition metals. It is a precious metal that is highly valued for its luster, durability, and conductivity.
Plum pudding and raisin bread are good comparisons for Thomson's model of the atom because both posit a positively charged "pudding" with negatively charged "raisins" embedded within, similar to Thomson's idea of the atom having a "sea" of positive charge with electrons scattered throughout. This analogy helps to illustrate the distribution of charge within the atom proposed by Thomson.
What elements comprise 96 of all living things?
The elements that comprise 96% of all living things are carbon, hydrogen, nitrogen, and oxygen. These elements are essential for the structure and functioning of biological molecules such as carbohydrates, proteins, lipids, and nucleic acids.
The following countries are the only ones that mine over 100,000 metric tons of lead.
- China
- Australia
- United States
- Peru
- Mexico
Lead ore is usually unearthed in Galena or Pyrite.
What classification is lawrencium?
Lawrencium is a member of the actinoids family, period 7 of the Periodic Table of Mendeleev.
How is the mass number different from the atomic number of an atom?
Atomic number of an element is the number of protons that an atom of an element contains. The atomic weight (the mass of the atom) is measured by not only the mass of the proton(s), but by the mass of the nuetrons and electrons too.
What is the electron configuration of CI?
long hand: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
short hand: [Kr] 5s2 4d10 5p5
*remember the number after the letter is written as an exponent*
Does the element indium cry when bent?
Yes, indium emits a peculiar "cry" sound when bent due to a phenomenon called the "indium cry." This occurs because of the deformation of its metallic crystal lattice structure, producing a unique sound that resembles a cry or a scream.
What element is found in head of safety matches?
The match head contains sulpur and an oxidising agent and they have to be struck against a special surface to make the flame. The special surface contains sand, red phosphorus and a binder. When the match is struck, friction is gererated as a form of heat and the red phosphorus turns to a white phosphorus vapour which ignites spontaneously on contact with oxygen in air. The sulphur starts to burn and ignites the match stick
What happens when Ammonia is heated?
The Urea molecule splits into two releasing carbon dioxide and ammonia.
It separates the metals from nonmetals in the Periodic Table.
-Anartori
Where are the semi-metal found on the periodic table?
Semi-metals, also known as metalloids, are found along the staircase line on the periodic table. Some examples of semi-metals include boron, silicon, germanium, arsenic, antimony, and tellurium. These elements show properties of both metals and nonmetals.
What is the chemical compound represented by MgSO4?
Magnesium sulfate is the chemical compound represented by MgSO4. It is commonly known as Epsom salt and is used in medicine and as a fertilizer.
Why was Ni chosen as the chemical symbol for nickel?
The symbol Ni for nickel was chosen based on its Latin name "nīculum". This Latin name was derived from a German word "Kupfernickel" which translates to "copper demon" and was originally mistaken for a copper ore by miners.
What major change occurs as you move left to right on the periodic table?
As you move left to right on the periodic table, the number of valence electrons an element has increases. The number of valence electrons an element has corresponds to which group (column) an element is. (This rule does not apply to transition metals...)
Are group 12 on the periodic table lanthandies or actinides?
Group 12 elements on the periodic table are not lanthanides or actinides. They are transition metals, also known as the zinc group, which includes elements like zinc (Zn), cadmium (Cd), and mercury (Hg). Lanthanides and actinides are separate groups that are located in the inner transition metals section of the periodic table.
What are some examples of compounds that Plutonium forms?
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Plutonium is used in Uranium and Plutonium bars for the reactors and stabilization of the NPP (Nuclear Power Plant) chemical or nuclear machine motor.
Hope I helped.
Is the element californium man made?
Californium was obtained by Stanley G. Thompson, Kenneth Street, Albert Ghiorso and Glenn Seaborg in 1950 at Berkeley Laboratories. The nuclear reaction is: Curium 242 + Helium 4-------Californium 245 + neutron
Why is platinium the least reactive?
Platinum is the least reactive among the noble metals due to its high resistance to corrosion and chemical attack. This is because platinum possesses a stable electron configuration, which makes it less likely to form chemical bonds with other elements. Additionally, platinum has a strong metal-metal bond within its structure, further contributing to its inertness.
Who invented modern periodic table?
Dmitri Mendeleev was the inventor of the old periodic table but Henry Moseley changed the concept of atomic weight to atomic number and thus he corrected the defects in the old periodic table and he is called as the father of Modern Periodic Table.
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Henry Gwyn Jeffreys Moseley (23 November 1887 - 10 August 1915) was an English physicist. Moseley's outstanding contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number. This stemmed from his development of Moseley's law in X-ray spectra. Moseley's Law justified many concepts in chemistry by sorting the chemical elements of the periodic table of the elements in a quite logical order based on their physics.
Moseley's law advanced atomic physics by providing the first experimental evidence in favour of Niels Bohr's theory, aside from the hydrogen atom spectrum which the Bohr theory was designed to reproduce. That theory refined Ernest Rutherford's and Antonius van den Broek's model, which proposed that the atom contains in its nucleus a number of positive nuclear charges that is equal to its (atomic) number in the periodic table. This remains the accepted model today.
What does the chemical symbol D stand for?
The chemical symbol D typically stands for deuterium, which is a stable isotope of hydrogen with a nucleus containing one proton and one neutron. It is commonly used in labeling molecules in various scientific studies.
What is the one hundred eighteenth element in the periodic table of the elements?
Name: Ununoctium
Symbol: Uuo
Atomic number: 118
Atomic weight: [ 294 ]
Standard state: presumably a gas at 298 K
CAS Registry ID: 54144-19-3
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably a colourless gas
Classification: Non-metallic
Not naturally occurring that we know of and unstable.
