Explain at a level of detail dmitri mendeleev would have understood how halogens and alkali metals are extremely reactive, whereas noble gases are not reactive compare properties of molecules formed from atoms in similar families for example, h 2 s versus h 2 o. Explain at a level of detail dmitri mendeleev would have understood how halogens and alkali metals are extremely reactive whereas noble gases are not reactive right in atomic number so potassium(k) on period 4 will have 4 electron shells. Halogens are more reactive because there not as stable as noble gases noble gases have the perfect number of valence electrons, and are considered the most stable elements because of this, which is why other numbers have charges, to lose or gain electrons in accordance with trying to suceed a noble gas configuration. Explain how the periodic table is organized describe the properties of the different periods and groups understand the properties of alkali metals, alkaline earth metals, halogens, noble gases. Alkali metals have only one valence electron, and if you'll recall all atoms want to be noble gases, ie they want full valence shells since alkali metals have this one electron in their valence shell, they'll readily give away their one electron than attempt to pull in seven electrons.
Because noble gases don't need to give or take any electrons - they have a perfect octet configuration where as halogens need to gain or lose electrons and will easily react to other halogens. All key elements of the assignment are covered in a substantive way explain, at a level of detail dmitri mendeleev would have understood, how halogens and alkali metals are extremely reactive, whereas noble gases are not reactive compare properties of molecules formed from atoms in similar families, for example, h 2 s versus h 2 o explain. Dmitri mendeleev would have understood how halogens and alkali metals are extremely reactive, whereas noble gases are not reactive--how expert answer get this answer with chegg study.
Periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number—ie, the total number of protons in the atomic nucleus when the chemical elements are thus arranged, there is a recurring pattern called the periodic law in their properties, in which elements in the same. Best answer: mendeleev's periodic table suffered defects as follows: the position of hydrogen was not correctly defined it was placed in group i although it resembles both the group i elements - the alkali metals and the group vii elements-the halogens, in their properties.
Best answer: because alkalai metals have 1 valence electron and halogens have 7 it is easy for an alkali to lose one and for a halogen to gain one electron this is because all atoms like to be isoelectronic to a noble gas, or have the last energy level filled. Explain in detail dmitri mendeleev would have understood how halogens and alkali metals are extremely reactive, whereas noble gases are not reactive. Alkali metals are very reactive, and thus none occurs in a free state in the environment they spontaneously react with oxygen, water, halogens , phosphorus, sulfur, and other substances lithium even reacts with nitrogen.
Lithium, the lightest of the alkali metals, is the only alkali metal which reacts with nitrogen at standard conditions, and its nitride is the only stable alkali metal nitride nitrogen is an unreactive gas because breaking the strong triple bond in the dinitrogen molecule (n 2 ) requires a lot of energy. This gives the students a direct connection to the method dmitri mendeleev used for his discovery of the periodic table of elements quick six is a card game about the elements one player calls out attributes from a compiled list of all the elements.
The alkali metals, the group 1 elements, all have the electronic configuration of a noble gas plus one extra electron if this electron is removed in a chemical reaction, a positively charged ion (called a cation ) will be formed and this ion will have the electronic configuration of a noble gas atom. In 1869, russian chemist dmitri mendeleev produced a periodic table based on atomic weights but arranged 'periodically' elements with similar properties appeared under each other gaps were left for yet to be discovered elements.