Periodic Table

Sodium chloride is an ionic compound that has a crystalline structure. Each sodium ion (Na+) interacts with 6 chloride ions (Cl-) on each side of it, and each Cl- interacts with the 6 Na+ around it. In a single salt crystal, there are millions and millions of ionic bonds. To melt an ionic material, you have to break each of those ionic bonds. Ionic bonds are not that weak, and when you try to break all of them it takes a lot of energy! Ionic compounds are different than molecular ones in this way. To melt ice, for instance, you don't have to break the bonds in water, you just have break the much weaker attractive forces between two water molecules that are next to each other (called intermolecular forces). These types of attractive forces are much easier to breaker than ionic bonds, and so most molecular compounds have lower melting point than do ionic ones. Most ionic compounds have very very high melting points in fact.

The element that reflects light is called a mirror. Mirrors work by reflecting light rays in a way that preserves the image's details and colors, creating a reflection of objects in front of them. The smoother the surface of the mirror, the clearer the reflection will be.

Rust forms when iron or iron alloys are exposed to oxygen and moisture. The presence of oxygen allows for the oxidation of iron, leading to the formation of iron oxide (rust).

At least Na, K, Hg, Ag, Au, Pb, Sn, and Sb. Some would also include Ga.

Electronegativity generally increases from left to right across a period and decreases down a group. This is due to the increasing nuclear charge across a period and the increasing distance between the outer electrons and the nucleus down a group, affecting the ability of an atom to attract electrons.

The periodic table is an orderly arrangement of elements based on their atomic number, electron configuration, and chemical properties. It organizes elements into groups and periods to show trends in their behavior and properties.

Each column in the periodic table contains elements with similar chemical properties due to their shared electron configuration. These elements have the same number of valence electrons, which determines how they react chemically. This organization allows for the prediction of an element's behavior based on its position in the table.

hi there

It depends really, there are many elements on the periodic table that are split into groups, 8 groups to be exact (0-7), which consist of reactive metals, transition metals, other metals, non-metals and noble gases. on every element there is the mass number which is the total number of protons and neutrons and then there is the atomic number which is the number of protons and its the same as the number of electrons.

hope this helps :)

no

Iron Oxide [Rust] is most often represented as Fe2O3.

Both beryllium (Be) and magnesium (Mg) are alkaline earth metals located in Group 2 of the periodic table. They share similar properties such as being lightweight, relatively reactive, and having low melting points. Additionally, they both have two valence electrons.

"LGB" in gold typically stands for "London Good Delivery Bar," which is a commonly traded gold bar that meets certain quality standards for trading on the London bullion market.

The elements that form diatomic molecules are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine, and astatine. The chemical formula for each diatomic molecule is H2, N2, O2, F2, Cl2, Br2, I2, and At2.

The elements in the Periodic Table are arranged so that elements in the same group (column) will exhibit certain similar characteristics with others in that same group, but different periods (rows). So you can predict, with a certain degree of confidence, how a certain element may behave by where it is located on the periodic table, based on what you know about how other elements in the same group behave. This is mainly due to the valence electrons (the outermost electrons) being the same configuration as others in the same group. The valence electrons are a big determining factor as how that element will react with other elements.

They do not all behave exactly the same, but similar.

No, the density of each element cannot be found directly on the periodic table. The periodic table typically provides information on the atomic number, atomic weight, and symbol of each element. However, the density of each element can be found in reference materials and online databases.

As you move from left to right on the periodic table, the atomic masses generally increase. This is because the number of protons and neutrons in the nucleus of the atom also increases as you move across a period.

The periodic label for sulfur is S, which is its chemical symbol.

Yes, as you move across a row (period) of the periodic table from left to right, the atomic radius tends to decrease. This is due to the increasing effective nuclear charge, which pulls the electrons closer to the nucleus, making the atoms smaller.

Newland's octet rule was proposed in the late 19th century, specifically in 1865. This rule states that elements tend to combine in such a way that they each achieve a full outer electron shell with eight electrons, similar to the noble gases.

Ni (and not NI) is the symbol for the element nickel.

No, gluten is a molecule not an element. Gluten's chemical formula is C29H37N5O9.

Yes, alkali metals are highly reactive because they have one valence electron that they readily donate to achieve a stable electron configuration. This makes them extremely reactive with water and air, which results in explosive reactions.

Well all of the metals except mercury are solids, and they are on the left side of the table. Along the stair-steps are the metalloids, which have metallic properties and nonmetallic properties. So those are solids. Nonmetals are solids, liquids and gases at STP (standard temperature and pressure). The right side is mostly gases though, the only solids at STP across the stair step are sulfur and iodine, the rest are gases and solids. in terms of melting and boiling points, they decrease across the table, because gases have very low melting and boiling points and they are more prominent in the right side of the table. Other properties such as malleability and ductility decrease across the table. In terms of Chemical properties, they change according to number of valence electrons... and I'm not sure which ones you want me to mention... In terms of chemical reactivity, groups one and two are the most likely to react, and so is group 17, the rest really depends on the number of valence electrons. So if an element say in the transition metals category, the fewer amount of valence electrons, the better. for nonmetals, they're all pretty reactive if they have like 6 or 7 valence electrons. But noble gases barely EVER react...

The elements are simply Tellurium and Iodine that didn't obey Mendeleev's law because the elements' atomic mass are not following along on the fifth row or period of the normal periodic table today's use.

The Nelson Science Textbook of Grade 9 for Ontario states that Mendeleev's periodic table on pages 126-127 includes elements arranged by increasing atomic mass and grouped with similar properties. Mendeleev left gaps for undiscovered elements and predicted the properties of these missing elements based on the pattern of the known elements.