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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 an isotope and how is it determined?

Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. They are determined based on their atomic mass, which is the sum of protons and neutrons in the nucleus. Isotopes of an element have similar chemical properties but may have different physical properties, such as radioactive decay rates.

What does the letters stand for in the periodic table of elements?

Before you find what you're looking for in this list, I thought I should just let you know that the only letter you will not find in either the names of the elements or their chemical symbols is 'J'. Otherwise, happy finding :)

H - Hydrogen

Li - Lithium

Na - Sodium

K - Potassium

Rb - Rubidium

Cs - Caesium

Fr - Francium

Ra - Radium

Be - Beryllium

Mg - Magnesium

Ca - Calcium

Sr - Strontium

Ba - Barium

Ra - Radium

Sc - Scantium

Y - Yttrium

Lu - Lutetium

Lr - Lawrencium

Ti - Titanium

Zr - Zirconium

Hf - Hafnium

Rf - Rutherfordium

V - Vanadium

Nb - Nibium

Ta - Tantalum

Cr - Chromium

Mo - Molybdenum

W - Tungsten

Sg - Seaborgium

Mn - Magnese

Tc - Technetium

Re - Rhenium

Bh - Bohrium

Fe - Iron

Ru - Ruthenium

Os - Osmium

Hs - Hassium

Co - Cobalt

Rh - Rhodium

Ir - Iridium

Mt - Meitnerium

Ni - Nickle

Pd - Palladium

Pt - Platinum

Ds - Darmstadtium

Cu - Copper

Ag - Silver

Au - Gold

Rg - Roentgenium

Zn - Zinc

Cd - Cadmium

Hg - Mercury

Uub - Unumbium

B - Boron

Al - Aluminium

Ga - Gallium

In - Indium

Tl - Thallium

C - Carbon

Si - Silicon

Ge - Germanium

Sn - Tin

Pb - Lead

N - Nitrogen

P - Phosphorus

As - Arsenic

Sb - Antimony

Bi - Bismuth

O - Oxygen S - Sulphur Se - Selenium

Te - Tellurium

Po - Polonim

F - Flourine

Cl - Chlorine

Br - Bromine

I - Iodine

At - Astatine

He - Helium

Ne - Neon

Ar - Argon

Kr - Krypton

Xe - Xenon

Rn - Radon La - Lanthanum Ac - Actinium Ce - Cerium

Th - Thorium Pr - Praseodymium

Pa - Proactinium

Nd - Neodymium

U - Uranium Pm - Promethium

Np - Neptunium

Sm - Samarium Pu - Plutonium

Eu - Europium

Am - Americium

Gd - Gadolinium

Cm - Curium

Tb - Terbium

Bk - Berkelium

Dy - Dysprosium

Cf - Californium

Ho - Holmium

Es - Einsteinium

Er - Erbium Fm - Fermium

Tm - Thulium

Md - Mendelevium

Yb - Ytterbium

No - Nobelium Uuu - Unununium

Uun - Ununnilium Uut - Ununtrium Uuq - Ununquadium Uup - Ununpentium Uuh - Ununhexium Uus - Ununseptium Uuo - Ununoctium Uue - Ununennium Unb - Unbinilium

What would happen if copper sulfate evaporated?

Copper sulfate would crystalize as blue crystals, water would evaporate.

To get the copper sulfate itself to evaporate you would need to heat it, melting the dry crystals then vaporizing them.

What does it mean when you move left or right?

Moving left or right typically refers to shifting one's position or direction in a lateral manner, either physically or in a metaphorical sense. It can indicate a change in perspective, decision, or course of action.

What feature makes the elements in this group not reactive?

The noble gases have a full outer electron shell, making them very stable and unreactive. This is because they already have a complete set of electrons, so they do not need to gain, lose, or share electrons with other elements to achieve stability.

Why thermal stability decreases down the group?

Thermal stability decreases down the group due to the increase in atomic size and metallic character. Larger atoms have weaker metallic bonds, leading to decreased thermal stability as we move down the group. Additionally, the presence of higher energy levels and more electron shielding diminishes the attraction between the nucleus and outer electrons, making the elements less stable at higher temperatures.

How many electrons does hydrogen want to obtain?

Hydrogen wants to obtain one electron to achieve a stable electron configuration similar to the noble gas helium.

Is oxygen has more electron affinity than sulfur?

No, sulfur has a higher electron affinity than oxygen. Electron affinity is the energy released when an atom gains an electron to form a negative ion, and sulfur's larger size and higher effective nuclear charge make it more likely to attract an additional electron compared to oxygen.

Is copper a metallic or nonmetallic element?

It is metal as it conducts electricity and it is on the left side of that big black line in the periodic table. It is in fact used in wires for it's conductive properties.

Why is most reactive nonmetal are found in group 17?

All metals react with other elements by losing their outermost electrons in their atoms forming 'positive ions'. So the ease with which they can lose these electrons gives us an indication of how reactive they are.

Aluminium, as an example has three electrons in the outer orbits of each aluminum atom, and so three have to be lost for the aluminum to react. Calcium, a more reactive metal has only 2 electrons in the outermost orbits of its atoms, and so these are more easily lost, making calcium more reactive.

However all group 1 elements (Lithium, Sodium, Potassium, Rubidium, Caesium, Francium) all have just one electron in the outermost orbits of their atoms, and so they are the most reactive of all metals as this one electron is very easily lost.

More than this, the reactivity gets stronger as the atoms get larger (as you proceed down the group) because the outermost electron is further away from the nucleus and is therefore less strongly bound to the atom than the outermost electron in smaller atoms like lithium as the electron is closer to the nucleus and more tightly bonded to the rest of the atom.

This means that Lithium is the least reactive of the Group 1 elements and Francium the most reactive. Francium is radioactive and does not exist in large quantities, so practically caesium is the most reactive. Lithium, when placed on the surface of some water fizzes vigorously. However, caesium, when placed in a glass trough of water explodes violently, with enough force to shatter the trough and possibly damage greatly the surrounding area too.

Where are metaloids located on periodic table?

Metalloids are located on the periodic table along the staircase dividing metals to the left and non-metals to the right. They include elements such as boron, silicon, germanium, arsenic, antimony, and tellurium. Metalloids have properties intermediate between metals and non-metals.

What does uranium have in common with the same elements it its group?

Uranium belongs to the actinide series in the periodic table, and shares similar chemical properties with other actinide elements such as thorium and plutonium. These elements all have similar electron configurations and reactivity due to the presence of the same number of valence electrons.

What is the group number of sodium on the periodic table?

sodium(Na) belongs to the Ist group. This group is also known as alkaline metals.

Is methyl alcohol in the periodic table?

Alcohol is a compound, not an element. Only elements are found on the periodic table.

What is mercury common use?

Mercury is used in a wide variety of household products, including paint, thermometers, thermostats, batteries, fluorescent lamps, disinfectants, antiseptics, diuretics and preservatives. These items release mercury into the environment and home when broken, mishandled or disposed. Proper care is important when dealing with mercury-containing products. If spilled, mercury absorbs into many household materials while slowly evaporating into the air over time, allowing for exposure. Knowing what products and items contain mercury and handling them properly will limit the risk of mercury exposure. Common products often have a simple and environmentally friendly alternative.

What is chcch3?

"Chcch3" is not a recognized or commonly used chemical formula. It appears to be an incorrect or unclear representation of a chemical compound. If you can provide more context or clarify the intended formula, I can help provide more information.

What are some properties mendeleev used to place the elements in order?

He mostly used this:

-How much atomic mass (at first he used this method but he later corrected it to this:)

-atomic number or the number of protons

He used this to determined the order of the periodic table together:)

What refers to the placement and arrangement of the text and graphic elements of a side?

Layout design refers to the placement and arrangement of text and graphic elements on a page. It involves organizing content in a visually appealing and functional way to communicate a message effectively.

What are the characteristics of an abnormal tilt table test?

An abnormal tilt table test is typically characterized by a drop in blood pressure or heart rate upon standing, leading to symptoms such as dizziness, lightheadedness, or fainting. It may indicate conditions like orthostatic hypotension, vasovagal syncope, or autonomic dysfunction. Additional testing and evaluation are usually necessary to determine the underlying cause.

What are synthetic radioactive elements?

There are several possibilities for elements that are always radioactive and are artificially produced:

Technetium

Promethium

Any element with atomic number 92 (plutonium) or heavier. There are approx 25 of these in existence up to element 118 (element 117 has not been made yet). Additionally, it could be argued that plutonium is found naturally. But only the faintest traces can be found, and could be said to be produced artificially via neutron capture by uranium. It might be (and probably is) possible to create technitium or promethium in the same manner if precursor nuclei for those elements are found with naturally occurring uranium. Neutron capture is possible across a fairly wide range of elements.

Do all isotopes have whole number atomic masses?

The short answer is yes. The long answer is that isotopes have different numbers of neutrons than other isotopes of the same element, so when expressing the mass of an isotope, you don't take an average; you just add the number of neutrons and the number of protons. However, that number is not entirely accurate since the mass of a proton and a neutron are very slightly different. So, if you want to be very exact, then no, the mass of an isotope is not a whole number, but it is very, very close.

What is the 47th element?

The 47th element on the periodic table is silver, with the symbol Ag. Silver is a transition metal with atomic number 47 and is known for its use in jewelry, photography, and as a conductor of electricity.

How many tables are in the periodic table?

The periodic table is just ONE table. There are not sub-tables. The periodic table is divided into periods (the horizontal rows of the table) and groups (the vertical columns). As you move horizontally across the table, an increase is the atomic number is seen, along with trends in acidity, bonding behavior, and reactivity. The groups are arranged to contain elements that have similar properties. For example, Group 1 is called the alkali earth metals group; all are light, highly reactive metals. Many more trends and groupings exist.

Does silver or gold heat up faster?

Silver heats up faster than gold, as it has higher thermal conductivity, meaning it can transfer heat more quickly. Gold, on the other hand, has lower thermal conductivity, so it takes longer to heat up.