Group 9 of the periodic table is comprised of cobalt (Co), Rhodium (Rh), Iridium (Ir), and one which is still chemically uncharacterized Meitnerium (Mt). These elements are all metals. These metals are termed Transition metals.
These metals are in the d-block because the last elements are in the d-orbitals.
Answer: Thats false the Russians were the first
Explanation:
Answer:
Halogens
Explanation:
The elements of 17th group of modern periodic table is known as halogens . The word halogen means salt former and compound which contains halogens are called salt.
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Option C.When a neutral hydrogen atom loses an electron, a positively-charged
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- When a neutral hydrogen atom loses an electron a positively charged particle must remain.
- Proton is a positive charge of +1 e charge with a mass that is slightly less than that of a neutron.
- Ernest Rutherford discovered that a atom must have a concentrated positive charge at the center that contains most of the atom's mass. He stated that the nucleus contained a positive charge the proton. And the weight of a proton is 1837 times heavier than the weight of the electron.
Result: Losing of an electron by hydrogen lefts a positive charge i.e proton.
The TLC analysis is aimed to verify the completion and the product of the reaction. potassium permanganate is then added to the TLC plate to detect the existence of double bond in the final product. Potassium permanganate reacts with the double bond and makes the spot yellow-brown.
Electrophilic addition is an exothermic reaction, in which a pi bond is turned into a sigma bond. The double bond in the alkene acts as a nucleophile. Halogens, halogen acids , hypohalous acids, sulphonic acid and water can be used as the electrophilic reagent. In this experiment, bromination of cholesterol is performed. The electrophilic attack of Br2generates acyclic bromonium ion. The addition gives a trans stereochemistry to the bromonium ion. As the Br-attacks the most substituted carbon in anti-periplanar fashion by SN2reaction, it would result in the inversion of configuration at that specific carbon.
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