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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
Why where the lanthanide and actinide elements droped out of order on the periodic tabel?
The vertical columns of the periodic table are arranged to contain elements that have similar chemical and physical properties.
The two rows at the bottom (called the Lanthanide and Actinide series) are elements that would all fit into group IIIB, in periods (horizontal rows) 6 and 7. since there is only one spot on the chart for all the elements in each series, they are listed separately at the bottom of the table.
What is the group name for group 4 in the periodic table?
Group 4 is titanium family and is a part of transition metals.
What elements is a member of the halogen family and is located in period 3?
Chlorine is the halofen present in the third periodg
What is Hf on the periodic table?
Hf is the symbol on the periodic table for the element Hafnium, it has an atomic number of 72.
Who discovered the element Ununnillium?
2000:
Yu. Ts. Oganessian, V. K. Utyonkov, Yu. V. Lobanov, F. Sh. Abdullin, A. N. Polyakov, I. V. Shirokovsky, Yu. S. Tsyganov, G. G. Gulbekian, S. L. Bogomolov, B. N. Gikal, A. N. Mezentsev, S. Iliev, V. G. Subbotin, A. M. Sukhov, O. V. Ivanov, G. V. Buklanov, K. Subotic, and M. G. Itkis
Joint Institute for Nuclear Research, RU-141980 Dubna, Russian Federation
K. J. Moody, J. F. Wild, N. J. Stoyer, M. A. Stoyer, R. W. Lougheed, and C. A. Laue
University of California, Lawrence Livermore National Laboratory, Livermore, California
Ye. A. Karelin
Research Institute of Atomic Reactors, RU-433510 Dimitrovgrad, Russian Federation
A. N. Tatarinov
State Enterprise Electrohimpribor, RU-624200 Lesnoy, Russian Federation
Does Tungsten is an alkali metal?
No, tungsten is not an alkali metal. Tungsten is a transition metal and is found in the middle of the periodic table. Alkali metals are found in Group 1 of the periodic table and include elements such as lithium, sodium, and potassium.
How the tendency change to gain electrons from left to right across a period?
The tendency to gain electrons increases from left to right across a period due to increasing effective nuclear charge, which pulls electrons closer to the nucleus, making it easier to attract additional electrons. This trend is due to the increasing number of protons in the nucleus and the decreasing atomic size as you move from left to right across a period.
Where on the periodic table would you find five elements that have very similar properties?
You would likely find five elements with very similar properties in the same group of the periodic table. For example, elements in Group 1 (alkali metals) like lithium, sodium, potassium, rubidium, and cesium share similar characteristics such as being soft, highly reactive metals with low melting points and easily losing electron to form cations.
What elements make up hydrogen fluoride?
Fluoride is an ion consisting of a single atom of fluorine atom with a -1 charge.
The fluoride in toothpaste and other dental products is sodium fluoride , consisting of sodium, and fluorine.
Which element is found in period 2 group 5A?
Pnictogens - the nonmetals nitrogen (N), phosphorus (P), the metalloids arsenic (As) antimony (Sb), and the metal bismuth (Bi).
Gaseous element with atomic number 10?
The gaseous element with atomic number 10 is neon (Ne). It is a noble gas with a full outer electron shell, making it very stable and unreactive under normal conditions. Neon is commonly used in neon signs and lighting.
What properties do group 17 and 18 in the periodic table have in common?
The chemical properties of elements in group 1 (the alkali metals) are: They are the most reactive metals therefore they are always found in compounds in nature. Reactivity increases as atomic number increases, due to a lower IE (ionization energy). They react with elements in group 17 to give the general formula MX (M is the metal and X represents any members of group 17. M + X --> MX Example Na + Cl --> NaCl The chemical properties of elements in group 17 (the halogens) are: It is the only group that contains all three phases of matter. They occur in nature only in compounds because of their high reactivity. Reactivity decreases as atomic number increases due to lower electronegativitie
What is the percentage of water in the hydrate CoCl2 and 6H2O Show your work?
1. Find the molar mass of the hydrate.
Find the molar mass of the water molecules (18.01528 x # water molecules) and of the anhydrate; add the values together to find the molar mass of the hydrate.
Molar Mass Water + Molar Mass Anhydrate = Molar Mass Hydrate
2. Find the percent of water in hydrate.
Divide the molar mass of water by the molar mass of hydrate; multiply by 100%.
- Mass water
Mass hydrate x 100%
What part of the periodic table is cesium?
Cesium is a chemical element located in Group 1 and Period 6 of the periodic table. It is an alkali metal with the symbol Cs and atomic number 55.
Which elements react with nitrate?
Metals like magnesium, aluminum, and zinc can react with nitrates to produce metal oxides, nitrogen dioxide gas, and oxygen gas. However, noble gases like helium, neon, and argon do not react with nitrate ions.
What does 55 in periodic table of elements stand for?
Element 55 in the periodic table is Cesium (Cs). It is a soft, silvery-white alkali metal with a melting point of 28.5°C, making it one of only five elemental metals that are liquid near room temperature. Cesium is highly reactive, reacting violently with water.
Where in the periodic table would you expect to find the most reacting metal?
The most reactive metals are typically found in Group 1 (alkali metals) and Group 2 (alkaline earth metals) of the periodic table. Group 1 elements like lithium, sodium, and potassium are highly reactive due to their tendency to lose electrons, while Group 2 elements like beryllium and magnesium also exhibit reactivity but to a lesser extent compared to Group 1.
What is the symbol of the element in group 7 and period 5?
The element in group 7 and period 5 is iodine, represented by the symbol I on the periodic table. It is a nonmetal that is commonly used in a variety of applications, including pharmaceuticals and dyes.
What does the number 24 represents on the periodic table?
- Name: Chromium
- Symbol: Cr
- Atomic number: 24
- Atomic weight: 51.9961 (6)
- Standard state: solid at 298 K
- CAS Registry ID: 7440-47-3
- Group in periodic table: 6
- Group name: (none)
- Period in periodic table: 4
- Block in periodic table: d-block
- Colour: silvery metallic
- Classification: Metallic
Chromium is steel-gray, lustrous, hard, metallic, and takes a high polish. Its compounds are toxic. It is found as chromite ore. Siberian red lead (crocoite, PrCrO4) is a chromium ore prized as a red pigment for oil paints.
Emerald is a form of beryl (a beryllium aluminium silicate) which is green because of the inclusion of a little chromium into the beryl crytal lattice in place of some of the aluminium ions. Similarly, traces of chromium incorporated into the crystal lattice of corundum (crystalline aluminium oxide, Al2O3) as a replacement for some of the Al3+ ions results in another highly coloured gem stone, in this case the red ruby.
True.
The columns on the periodic table can be referred to as families, but more commonly they are referred to as groups. There are 18 groups on the periodic table.
What the period address of cesium?
Caesium is an alkali metal, placed in period 6, group 1 of the periodic table of Mendeleev; the atomic number is 55.
How are the elements in the first periodic table arranged?
In the first Periodic Table by Mendeleev, he arranged the elements in the increasing order of their atomic masses and repeating properties.
What is the most reactive metal and the most reactive nonmetal?
Actually, like human nature is dominant of on another. In the same way, metals and non-metals are also dominant over one another. The metals and non-metals have a tendency of displacing another metal or non-metal from its salt solution or any other compound. According to this property of theirs, they are classified as more or less reactive.
