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What is the trend in melting point and boiling points of the elemets in group 1 and 7?
In Group 1 (alkali metals), the melting and boiling points decrease as you move down the group due to the increase in atomic size and metallic bonding. In Group 7 (halogens), the melting and boiling points increase as you move down the group due to the increase in atomic size and London dispersion forces.
What is the trend in melting points as you go down the group of halogens?
The trend in melting points as you go down the group of halogens is that they generally increase. This is due to the increasing number of electrons and atomic size which results in stronger van der Waals forces between the atoms, leading to higher melting points.
What is the general trend of the melting points of elements on the periodic table?
The general trend of melting points of elements on the periodic table increases from left to right across a period and decreases down a group.
What is the melting point for Mg?
The melting point of magnesium is 650 degrees celcius. It has the lowest melting point among all the group II metals (alkaline earth metals), though the melting points generally decrease down the group - magnesium is an exception and has the lowest melting point among them.
What are the Group 7 melting points?
Manganese: 1 246 0C Technetium: 2 157 0C Rhenium: 3 187 0C
How do you find the relative melting point of a group of substance?
You have to look at the actual structures of each substance in the group. For each individual substance, think of it being multiplied many times, until you have a little "sea" of all one type of molecule. There are three forces that are possibly at work between these identical molecules: Van Der Waals, dipole-dipole, and hydrogen bonding. (You can find definitions for these terms with an online search if you're not sure what they are.) If a substance can participate in hydrogen bonding between two of its molecules (draw a picture of the structure, and then a copy of that structure oriented in such a way that the H of an H-F, H-O, or H-N bond can line up with a non-bonding electron pair on the second molecule) then it will have strong intermolecular forces, needing a lot of energy to break, and by extension a higher melting point. Dipole-Diploe forces, in the absence of hydrogen bonding, are next in line. The lowest melting points of substances occur when there are only Van Der Waals forces at work between the molecules of a substance.
Do group one metals have a high melting point?
No. Group 1 metals (commonly called the alkali metals) have low melting points.
Are the elements in the boron group high-melting?
It varies. Boron and thallium both have relatively high melting points while gallium and indium have very low melting points.
What is the trend in melting point and boiling points of the elemets in group 1 and 7?
In Group 1 (alkali metals), the melting and boiling points decrease as you move down the group due to the increase in atomic size and metallic bonding. In Group 7 (halogens), the melting and boiling points increase as you move down the group due to the increase in atomic size and London dispersion forces.
Melting points of alkali metals?
Alkali metals have relatively low melting points compared to the other metals. Their exact melting points depend on the element itself. But it would be useful to note that their melting points decreases down group I.
What is the trend in melting points as you go down the group of halogens?
The trend in melting points as you go down the group of halogens is that they generally increase. This is due to the increasing number of electrons and atomic size which results in stronger van der Waals forces between the atoms, leading to higher melting points.
What does melting and boiling point mean?
The relative temperature at which a group of solids change into liquids is known as relative melting point. As heat increases, the solid slowly changes its state as it melts. Melting of ice to water is an example for melting point.
Silvery solids with low densities and low melting points found in group 1?
These are alkali metals, such as lithium, sodium, and potassium. They have low densities and low melting points relative to other metals due to their atomic structure and metallic bonding. They are highly reactive and must be stored in oil to prevent reactions with moisture or oxygen in the air.
Which atomic group tend to go from higher to lower melting points reading from top to bottom?
Group 3
What is the general trend of the melting points of elements on the periodic table?
The general trend of melting points of elements on the periodic table increases from left to right across a period and decreases down a group.
Why do melting points of group 1 become lower?
The metallic bonds of the alkali metals are are weak.
What are the Boiling and Melting Points of alkaline earth metal?
The boiling points of alkaline earth metals generally increase down the group. For example, the boiling point of beryllium is around 2469°C and the boiling point of barium is around 1860°C. The melting points also generally decrease down the group.
