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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 the properties of group 3a elements?

Group 3A elements, also known as the boron group, have three electrons in their outer shell and exhibit variable oxidation states. They are typically metals and have low melting and boiling points. These elements can form covalent compounds and are known for their ability to form complex ions in solution.

How much viscosity in cf4 ccl4 and cbr4?

CF4 has the lowest viscosity, followed by CCl4, and then CBr4. This is because viscosity is generally higher for heavier molecules due to stronger intermolecular forces that inhibit molecular motion.

What does a muscle triad include?

A muscle triad includes one T-tubule and two terminal cisternae of the sarcoplasmic reticulum. This arrangement is responsible for regulating calcium release during muscle contraction in skeletal muscle cells.

What are the groups of elements of shiny?

In Shiny, elements can be categorized into input elements (like text inputs, sliders), output elements (like plots, tables), layout elements (like sidebars, tabs), and action elements (like action buttons, submit buttons). Each group of elements serves a specific purpose in creating interactive web applications.

WHAT IS A vertical looping pattern of airflow called?

A vertical looping pattern of airflow is called a vortex. Vortexes can form in fluids or gases and are characterized by rotating motion around an imaginary axis.

Is there a 6by6 rubik s cube?

Yes, It is called a professor's cube. i disagree with that .^ the 5x5 rubik's cube is the professor's cube. at least i think so. it's correct, the 5x5 is the professor but there is also a 6x6 and you can get it at v-cubes.com

What element is in the top left hand corner on the periodic table?

The element on the far upper left corner of the periodic table is HYDROGEN (H), with atomic number of 1.

What is the abbreviation for cyanide on the periodic table?

Cyanide isn't on the periodic table, it is a polyatomic ion. Its symbol is CN and has a -1 oxidation state

At which period do the principal energy levels begin to overlap in energy content?

The principal energy levels begin to overlap in energy content when electrons are in higher energy states, typically in the n=3 or higher levels. As electrons move further away from the nucleus, the energy levels become closer together, leading to overlap in energy content. This can result in the formation of molecular orbitals in chemical bonding situations.

In general the strength of the metallic bond decreases or increases on the periodic table?

The strength of the metallic bond generally decreases going down a group and increases moving across a period on the periodic table. This is because metallic bonding is influenced by the number of delocalized electrons available to form bonds, which changes with the size and number of valence electrons in atoms as you move within the table.

How are the terms group and period used on the periodic table?

On the periodic table, a group refers to a column of elements that share similar chemical properties due to having the same number of electrons in their outer shell. A period refers to a row of elements that have the same number of electron shells.

Which value of an element is calculated using both the mass and relative abundance of each of the naturally occurring isotopes of this element?

The weighted average atomic mass of an element is calculated using both the mass and relative abundance of each naturally occurring isotope of the element. This value represents the average mass of an atom taking into account the contribution of each isotope based on its abundance.

Group 17 elements on the periodic table are called?

Group 17 elements are called halogens. They include Fluorine-F, Chlorine-Cl, Bromine-Br, Iodine-I, and Astatine-At. They are all nonmetals and are reactive because they have 7 electrons in their outer shell, just one electron short of having a full shell.

Who put the periodic table in order?

It took many years to discover these elements. Hundreds of thousands worked and arranged the Periodic Table of Elements.




The basic design of the periodic table was thought up by Dmitri Mendeleev. It was his idea to arrange the elements according to atomic mass (because this gave repeating patterns of properties). Later it was discovered that atomic charge was what was really important. Eventually the gaps Mendeleev left were filled in by the discovery of more elements, so while many scientist contributed to the modern periodic table Mendeleev is considered to have invented it.

Which two elements are in the same period as neon?

There are seven, not two, other elements in the same period as neon. They are lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine.

Why do elements of a given period always follow the progression of metal to metalloid to nonmetal to nobel gas?

The elements in a period follow this progression due to their electronic configurations. The elements on the left side of the period are metals, which have 1-3 electrons in their outermost shell. Moving towards the right, the elements become metalloids and nonmetals with 4-7 electrons in their outer shell, before reaching the noble gases with a full valence shell of 8 electrons. This pattern is driven by the tendency to achieve a stable electron configuration.

What type of reaction is 4Al plus 3O2---2Al2O3?

It is a synthesis reaction because the two substances are combining to form one.

What has a regular repeating pattern in the periodic table?

The periodic table has a regular repeating pattern based on the arrangement of elements by increasing atomic number. Elements in the same group have similar chemical properties due to their shared number of valence electrons. This pattern helps predict the chemical behavior of elements.

Which element has 27 protons and 27 electrons per atom?

cobalt

you can use the periodic table to find answers to questions like this. its super easy- protons are the same as the atomic number, so whatever the atomic number is of the element on the periodic table, that's how many protons the atom has.

The electron number is where on a periodic table?

The atomic number is the number of protons in the nucleus of any atom of any element. Because all atoms are neutral, the number of protons = number of electons. So the atomic number is the number of electrons. You may be confusing an atom with an ion. Atoms of elements on the right side of the periodic table have a stronger attraction for electrons than atoms of elements on the left side, For example, when a chloride atom get close enough to an atom of Sodium, the electron in the outer shell of the Na atom will move to the outer shell of the Cl atom. Now the Cl atom has 17 protons and 18 electrtons making a -1 charged ion. The Na atom now has 11 protons and 10 electrons making a +1 charged ion.

Elements in column 1 of the periodic table form +1 ions.

Elements in column 2 of the periodic table form +2 ions.

Elements in column 7 of the periodic table form -1 ions.

Elements in column 6 of the periodic table form -2 ions.

Convert kw to cubic capacity of an internal combustion engines?

You can't, because they're all different.

I'm going to use horsepower instead of kW here because I'm an American and that's how we think; if you'd like to convert to kW, one HP is roughly 750 watts.

Let us examine the very common 1.6 liter engine. Every automaker has built one and they're all different. A Volkswagen Beetle 1.6 liter engine produced somewhere between 50 and 60 HP. Honda made one that put out about 120 HP. Mini Coopers have available to them an engine of the same size that makes 180 HP, and the 2014 Formula 1 race engine is a 1.6 liter V6 that makes 600 HP.

Why transitional elements have high enthalpy of atomisation?

Transition metals possess a high melting points and boiling points.These properties are due to mettalic bonding by delocalized electrons,leading to cohesion which increases with the number of shared elements.

Describe the trend in nonmetallic property of the elements in group 16?

The name of the group is the oxygen family. The valence number for elements in that group are -2. (gain or share two electrons) Oxygen, sulfur and selenium are nonmetals. Tellurium and Polonium are metalloids.