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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 number 23 on the periodic table?
Number 23 on the periodic table is vanadium. It is a transition metal with the chemical symbol V. Vanadium is used in the production of steel and in certain alloys due to its strength and resistance to corrosion.
How did scientists find the periodic table missing elements?
At first, a scientist named Dmitri Mendeleev organized the periodic table according to an element's atomic mass, in increasing order. However, the periodic table is now organized by atomic number, in increasing order. Additionally, each column, also called a group or family, has elements with the same number of electrons in its outermost electron shell (valence shell). Because of this, elements of the same column will react similarly in a chemical reaction. As well, there are several categories of elements on the periodic table. Group 1A are the alkali metals and have 1 valence electron. Group 2A are the alkaline earth metals and have 2 valence electrons. Group 8A are the noble gases and have 8 valence electrons, meaning they do not react with any elements. Group 7A are the Halogens and have 7 valence electrons. Elements found to the left of the metalloid line are metals and the middle part of the table contains transition metals, which can vary in their number of valence electrons. To the left of the metalloid line are nonmetals. Elements found along the metalloid line are metalloids and have both properties of metals and nonmetals. Finally, the two rows extracted from the table are the Lancthinides and Actinides, which are generally radioactive in nature.
What is the charge for elements in group 17?
Elements in group 17 of the periodic table are called halogens. They have a charge of -1 when they form ions by gaining one electron to achieve a full outer shell of electrons.
How chemically active are halogens?
Halogens are highly chemically active due to their strong tendency to gain an electron to achieve a full outer electron shell. They readily form compounds with other elements, particularly metals, through processes such as ionic or covalent bonding. Halogens can react vigorously with certain substances, making them important for various chemical applications.
What groups of elements on the periodic table tends to form ions?
Alkali metals group tends to form ions.They give single electron to gain positive charge.For example : Sodium give one electron to become Na+ ion.
What is the answer to this periodic table element pun you bought everything but the kitchen?
The answer is "Element K" which is potassium (K) on the periodic table.
No, iron is not an alkali metal. Alkali metals are a group of elements that include lithium, sodium, potassium, and others, all of which are found in Group 1 of the periodic table. Iron is a transition metal and is located in a different group of the periodic table.
Why is a row in a periodic table called a period?
A row in the periodic table is called a period because elements within the same row have similar chemical properties which repeat in a periodic manner. As you move across a period, the number of protons and electrons increases, leading to similar trends in the elements' properties.
Why when you mix 2 elements together you can often separate them again quite easily?
Mixtures can be separated easily, liquids by distillation, gases can be made into a liquid , and then heated gently to tap the gases off ( also called distillation) solids are a little more difficult and depend on the mixture.
Compounds are much harder to separate because they are chemically bonded together.They can be separated by electrolysis but this takes a large amount of energy.
What represents the number 54 above the symbol xe in the periodic table?
The number 54 above the symbol Xe in the periodic table represents the atomic number of the element xenon. Atomic number denotes the number of protons in an atom's nucleus, which is characteristic of a specific element. In this case, xenon has 54 protons.
If you think to cobalt this is a chemical element.
If you think to carbon monoxide this is only one molecule.
Are the angles for lead and sulfur atoms 90 degrees?
Yes! Completely True.... And BTW This Is A Homework Question For Life Science Class And It's A Shame You Are Cheating LOL But I Cheat Too! So You Are Forgiven
Where do the lanthanides and actinides get their names?
The lanthanides get their name from the element lanthanum, which was the first in the series to be discovered. The actinides get their name from actinium, which was the first element in this series to be discovered.
What are the three exceptions in the periodic table?
This question is a little bit cryptic. I think I can decipher what it means though. When Mendeleev introduced his periodic law, he expressed it in something like these terms:
If the elements are arranged in order of increasing atomic weight, there is a periodic recurrence of elements with similar properties.
Now in Mendeleev's time -- around 1870 -- not all of the natural elements were known, and even for those that were, not all atomic weights were known accurately enough.
When Mendeleev produced his second periodic table in 1871-- a table of elements arranged so that the periodic recurrence of similar elements could easily be seen, he had to make some "adjustments" to the atomic weight values that were generally accepted at the time. In most cases he was right to say that the accepted atomic weights were wrong, but in one case he was quite wrong about an atomic weight. The atomic weight of tellurium, a rare element that belongs in the sulfur family proved to be significantly larger than that of iodine, which belongs in the chlorine family. It simply did not fit with the periodic lawas Mendeleev understood it.
By the year 1900, this anomaly had been joined by two others: nickel and cobalt, and argon and potassium.
In 1913 an English chemist/physicist, Moseley, discovered the atomic number, and the modern version of the periodic law says that
If the elements are arranged in order of increasing atomic number, there is a periodic recurrence of elements with similar properties.
Usually, an element with larger atomic number has a larger atomic weight, but there are just these three examples where this is not the case.
• Element 18, argon, has atomic weight 39.95, but element 19, potassium has atomic weight 39.10
• Element 27, cobalt, has atomic weight 58.93, but element 28, nickel, has atomic weight 58.71
• Element 52, tellurium, has atomic weight 127.60, but element 53, iodine, has atomic weight 126.90
I think that these are probably the "three exceptions" that your question is referring to.
WHAT is the symbol equation for sodium oxide?
The symbol equation for the formation of sodium oxide is: 2Na + 1/2O2 -> Na2O.
Name a metal on the peridoic table?
Tungsten. Mercury. Tin. Gold. Lithium. Potassium. Calcium. Sodium. Titanium. Chromium.....................................................
What part of the periodic table tells you the number of electron clouds?
Generally speaking, the column or "group" usually defines the number of valence electrons an atom has, ignoring the transition metals, lanthanides and actinides. Valence electrons are the electrons available for use in bonding and not in a completed electron shell. The row or "period" really doesn't say much about valence electrons or electrons in general, as you go down the rows the atoms get larger (speaking of atomic weight) and thus have more electrons.
Knowing the column in which an element appears on the periodic table can tell you about its group/family. Elements in the same column typically share similar chemical properties and reactivity due to having the same number of valence electrons.
What is the main difference between groups and periods in a periodic table?
Groups, also known as families, are the vertical columns on the periodic table that contain elements with similar chemical properties due to the same number of valence electrons. Periods, on the other hand, are the horizontal rows on the periodic table that represent the number of electron shells an element has. Each period represents a new energy level of electrons.
What is the reason of arranging elements in a group?
grouping things make ones life easier by sorting them in their correct group by their similarities and differences.
grouping also makes it more easier for one to access his / her things
Why does an atom get larger as you go from top to bottom down a group?
An atom gets larger as you go down a group because each successive element in the group has an additional energy level of electrons compared to the previous element. This extra energy level increases the distance of the outer electrons from the nucleus, leading to a larger atomic radius.
CH4O2 is the chemical compound for Methyl hydroperoxide.
