Re: What are the contribution of the following in the development of the...
...operties of selected groups of elements 4. Newlands (1837-1898) devised a periodic table in order of relative atomic weights 5. Mendeleev (1834-1907) devised the first modern form of the periodic...
View ArticleThe reduction of copper ions?
Zn + Cu 2+ --> Zn 2+ + Cu Approximately how many grams of zinc are needed to reduce 0.386 g of copper ions. Use the periodic table instead of your calculator to answer this question.
View ArticleRe: The order of elements in the periodic table is based on?
The order of the elements in the periodic table is based on the number of protons in the nucleus. The number of neutrons decides the isotope, and the number of electrons decides the charge. For...
View ArticlePeriodic Table Questions?
I need help with my science homewok. Left my textbook at school. 1. Describe two uses for a member of each representative group. 2. Identify the group of elements that does not readily combine with...
View ArticlePeriodic Table Help!?
...overall? My text book says the following: "The elements in Group 1 of the periodic table, the alkali metals, all react with non-metal elements to form ionic compounds in which the metal ion has a...
View ArticleRe: Periodic Trends-Ionic Radii?
Atoms decrease in size moving from left to right on the periodic table. Ions increase in size doing moving from the far left to right side of the periodic table. This is because negative ion increase...
View ArticleRe: Why do elements on the left of the periodic table usually form positive...
All electrons try to attain a noble-gas configuration, having 8 valence electrons (with the exception of Helium). In order to do so, the elements on the left, mainly metals, will then lose their...
View ArticleRe: Which two atoms in the periodic table form the most polar bond?
Together in the same molecule, a Si-F covalent bond would be the most polar. They have a difference in electronegativity of 2.2.
View ArticleWhy do elements on the left of the periodic table usually form positive ions?
Why do elements of the left side of the periodic table usually form positive ions, while elements on the right side usually form negative ions? Could you explain as clearly as you can?
View ArticleWhich two atoms in the periodic table form the most polar bond?
Which two atoms in the periodic table form the most polar bond [Need help with Chemistry homework :)]
View ArticleRe: Why do elements on the left of the periodic table usually form positive...
there is an energy incentive to approximate the nearest nobel gas - so on the left side it is easier to give up one or two electrons and be isoelectronic with a nobel gas on the right side they need to...
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