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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

Is mercury a solvent?

"Mercuric fulminate, HgC2N2O2 ... (is) almost insoluble in cold water and requiring 130 times it weight of boiling water for solution. It may be heated to 180° C. before exploding, and the explosion so brought about is much milder than that produced by percussion."

NOTE: Water boils at 100° C.

http://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/Explosives

What is the ninth element on the periodic table of elements?

The ninth element on the periodic table of elements is fluorine (F). It is a highly reactive, pale yellow gas at room temperature. Fluorine is commonly used in toothpaste and water fluoridation to promote dental health.

What is the end of a table called?

The end of a table is typically called the "head" or "header." This area often contains column labels or titles to describe the data in the table.

Why is plasma called a high-energy state of matter?

Let's consider for a moment what we usually mean when we refer to states of matter. Typically, we think of four states: solid, liquid, gas, and possibly plasma. There are more, but for this explanation it will be easiest to think of it this way.

Now, let's look at how we move from one state to another. Suppose you have a block of ice, and you want to melt it. How are you going to do this? Most likely, you would suggest heating it. But heating is really just the introduction of thermal energy to your block of ice. In other words, you're adding energy, and as the molecules of water get more energetic, they change states so they can move around more easily. Thus, you go from solid to liquid.

The same reasoning goes for the other phase transitions. So, in our four-state scheme (again, solid->liquid->gas->plasma), plasma is the highest energy state of matter.

What is sucrose solid or liquid at room temperature?

Sucrose can be both solid or liquid. At room temperature, however, it's a solid.

What is table assessories?

Table accessories are items used to enhance and complement the appearance and functionality of a table. This can include items like tablecloths, napkins, centerpieces, place mats, and table runners. These accessories are often used to set the mood for a dining experience or event.

What is the subscript of carbon in periodic table?

Not sure if its what your looking for but if you a refering to the 12.011 that's the atomic weight. If you are refering to something like the make up like say water or h2o, it would depend on how many carbin elements your using. But by it self its just C

Which of the following is true of a base period for an index number?

A base period for an index number serves as the reference point for comparison with other periods. It is typically assigned a value of 100 for simplicity in calculations. The base period allows for tracking changes in the index over time relative to a fixed point.

Is aluminum made up of more than one element?

The aluminum that you find in stores/products is generally a alloy composed of different metal elements. This is done in order to make it more corrosion resistant and more powerful in strength. The element Aluminum on the periodic table however is pure and is an element.

Why does decay chain for radioisotope U-238 eventually stop at lead?

The decay chain for U-238 stops at lead because lead-206 is a stable isotope, meaning it does not undergo further radioactive decay. Once uranium-238 undergoes a series of alpha and beta decays, it eventually reaches a stable isotope of lead, which ends the decay chain.

What is trend in first ionization energies as one proceeds down the group 7A elements How this trends relates to the variation in atomic radii?

Ionization energies go down of course. This is because radii are becoming larger due to addition of electron levels. These farther from the nucleus electrons require less and less energy to liberate from the atom.

What are the top ten rarest naturally occurring elements on Earth listed in order?

1st Oxygen(O) 46.60%

2nd Silicon(Si) 27.72%

3rd Aluminum(Al) 8.13%

4th Iron(Fe) 5.00%

5th Calcium(Ca) 3.63%

6th Sodium(Na) 2.83%

7th Potassium(k) 2.59%

8th Magnesium(Mg) 2.09%

9th Titanium(Ti) 0.44%

10th Hydrogen(H) 0.14%

Identify the element in this group MgO Br LiF PbO?

The element in the group of MgO, Br, LiF, and PbO is Br (Bromine).

In an electron dot diagram of aluminum how many dots should be drawn around the elements symbol?

you draw the three valence electrons around Al. It does not matter where they are around the symbol, but you can't have more than one dot on each side. Although, if you have more than 4 valence electrons, you can put the extras on whatever side.

What block is W in the periodic table of elements?

The full name is Tungsten, it belongs to the d-block metals.

What is the p d f and g block on the periodic table?

  • The s, p, d, f and g blocks correspond to parts of the periodic table that have s, p, d, f and g orbitals.
  • s, p, d, and f also correspond to specific shapes of orbitals which can be searched on Google Images.
  • p-block elements are the elements in Groups IIIA - VIIIA
  • s-block elements are the elements in Groups IA and IIA (The s and p-blocks are known as the representative elements.)
  • d-block elements are the elements in Groups IB - VIIIB (Also known as "transition metals")
  • f-block elements are comprised of the actinoids and lanthanoids. (Also known as "inner-transition metals")
  • Note: the element created by Tony Stark in Iron Man 2 is not even close to possible for humans at this point. The closest that scientists have come to building an element with an atomic number higher than 200 is 118. This also ignores the fact that an element with such a large atom size would be highly radioactive.
  • NOTE: if you are not a theoretical physicist or working on publishing a paper on theoretical orbitals, then the rest of this answer is irrelevant.
  • While s, p, d, and f block elements and orbitals have been proved true by scientists' observations, further orbitals are also predicted by Schrodinger's Equations.
  • the g and h orbitals are 2 of the theoretical orbitals that have yet to be proven existent.
  • While scientists believe it is probable that they exist, it has also been speculated by scientists that any atom with this many orbitals will become incredibly large and decay via alpha radiation.
  • Since the largest atom created so far already has a half-life measured in fractions of a millisecond, larger atoms are expected to decay within even smaller fractions of time.
  • Scientists have also predicted "islands of stability" in g and h block groups; however, none have been proven due to the obvious lack of physical observations and proof.

What is the shape of a 2s orbital?

The 1s is a sphere, crossing all axis of course.

all the s orbitals are a sphere.

p orbital are opposile nodes on the x, the y, and the z axis.

Compared with Group 2A elements Group 6A elements have?

Group 6A elements have a higher electronegativity and a greater tendency to gain electrons to achieve a stable octet configuration. In contrast, Group 2A elements have a lower electronegativity and typically lose electrons to form cations.

It is a good idea to create a table for reviewing information when?

Creating a table is a good idea when you have structured data that needs to be organized and compared easily. Tables can help with quick visual comparison, tracking trends, and summarizing key information efficiently.

Hydrogen does not have the typical properties of a metal However hydrogen is located above Group 1A because it has one?

Hydrogen is located above Group 1A because it has one electron in its outermost shell, similar to the alkali metals in Group 1A. Despite this similarity, hydrogen is not considered a metal due to its unique properties, such as being a diatomic gas at room temperature and pressure.

What element is a reactive metal that attacks water?

All of the alkali metals, the alkaline earth metals heavier than magnesium, and the halogens fluorine and chlorine are all highly reactive with water itself.

Why reactive metals are usually found in compounded form?

Reactive metals are usually found in compound simply because they react easily. They readily form compounds by reacting with air, water, or other substances in their environment.

It is also difficult to extract many of these from their compounds, often electrolysis is the only effective way.

This process does not usually occur in nature.

The number of molecules in a teaspoon of starch is?

It is difficult to provide an exact number, but a rough estimate is on the order of Avogadro's number, which is approximately 6.022 x 10^23 molecules. This can vary depending on the molecular weight and structure of the starch.