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Marysya12 [62]
4 years ago
12

List 3 ways the periodic table is useful Help!

Chemistry
2 answers:
SashulF [63]4 years ago
6 0

The periodic table arranges the elements into families and periods (vertical and horizontal rows). The elements in each family have similar properties. As you go across a row, the properties vary gradually from one element to the next. The table tells you what elements may have similar chemical and physical properties.The periodic table describes the atomic structure of all known elements. For instance, by looking at the periodic table, you can find out the atomic mass and the number of electrons the element has. Each element has its own separate set of such data. No two elements are the same.This is perhaps the most useful feature of the Periodic Table. It is an excellent reference tool. In one place, you can find many properties of an element.

baherus [9]4 years ago
4 0
It is helpful because number one it tells u all the formulas number two u can find the atomic number  number 3 u can find out if it is a metal,nonmetal,or iron
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How do compounds differ from their component elements?
Vsevolod [243]
Compounds are different from elements primarily because compounds are composed of one or two elements. In this case, when elements are combined to form a compound,the reaction incurs a chemical change which results to a product with different properties as its base elements.
7 0
4 years ago
Determine if the bond between each pairs of atoms would be pure covalent, polar covalent, or ionic. n and se
Sveta_85 [38]

Types of Bonds can be predicted by calculating the difference in electronegativity.

If, Electronegativity difference is,

 

                Less than 0.4 then it is Non Polar Covalent Bond

                

                Between 0.4 and 1.7 then it is Polar Covalent Bond

            

                Greater than 1.7 then it is Ionic

 

For N and Se,

                    E.N of Nitrogen         =   3.04

                    E.N of Selenium        =   2.55

                                                   ________

                    E.N Difference             0.49          (Weakly Polar Covalent)


As you have not provided remaining pairs, so if you have any of them, follow the method as mentioned above.

3 0
4 years ago
A homogeneous mixture is also called _______________. a solution. an element. a pure substance. a heterogeneous mixture. a compo
inessss [21]
A solution is right answer.
6 0
4 years ago
The chemical formula for aluminum hydroxide is Al(Oh)3. How many hydrogen atoms are present in 1 molecule here?
grandymaker [24]
There are three molecules of hydrogen.
5 0
4 years ago
A molecule whose ends have opposite electric charge is call a_?
snow_lady [41]
A polar molecule is a molecule whose ends have opposite electric charges. An example of a polar molecule is H2O or water. Water has 1 side which is positive and the other side which is negative. It is a dipole which means that the two sides are not having the same charges.
5 0
3 years ago
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