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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 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 is the melting point of Bi lower than Sb and the melting point of Sb lower than As?
The melting point of elements generally increases going down a group in the periodic table due to increased atomic size and therefore stronger metallic bonding. However, in the case of Bi, its anomalous behavior is attributed to the presence of inert pairs that reduce metallic bonding. This makes the melting point of Bi lower than Sb, which follows the trend of increasing melting points down the group due to stronger metallic bonding. The same trend applies to Sb having a lower melting point than As due to the weaker metallic bonding in Sb compared to As, which also follows the trend of increasing melting points down the group.
Name two elements that are side by side on the periodic table that do not reflect the general trend in melting points for the periods?
One example of two elements that are side by side but do not follow the general melting point trend for the period are sodium (Na) and magnesium (Mg). Sodium has a lower melting point than magnesium, even though it is located to the left of magnesium on the periodic table.
What are properties of alkali metals?
highly reactive, tarnish easily, low melting points, soft, low density, some have weak radiation also it is very flammable in water
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 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 trend in density as you go down the group of halogens?
The density increase down.
What is the density trend in halogens as you go sown the group?
As you move down the group of halogens in the periodic table, the density generally increases. This trend is due to the larger atomic and molecular masses of the heavier halogens, which outweigh the increase in volume. For example, fluorine and chlorine are gases at room temperature, while bromine is a liquid and iodine is a solid, reflecting their increasing densities. Thus, the trend shows that as you descend the group, the halogens become denser.
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.
Which trend decreases for metals down a group?
Melting Point
What is the trend in the boiling points of the halogens?
The boiling point and the melting point of halogens is increasing from fluorine to iodine. Boiling points of halogens are: - Fluorine: -188,12 0C - Chlorine: -34,04 0C - Bromine: 137,8 0C - Iodine: 184,3 0C
Why is the melting point of Bi lower than Sb and the melting point of Sb lower than As?
The melting point of elements generally increases going down a group in the periodic table due to increased atomic size and therefore stronger metallic bonding. However, in the case of Bi, its anomalous behavior is attributed to the presence of inert pairs that reduce metallic bonding. This makes the melting point of Bi lower than Sb, which follows the trend of increasing melting points down the group due to stronger metallic bonding. The same trend applies to Sb having a lower melting point than As due to the weaker metallic bonding in Sb compared to As, which also follows the trend of increasing melting points down the group.
Identify the trend in melting point from lithium to caesium?
The trend in melting point from lithium to caesium is that it increases. Lithium has the lowest melting point of the alkali metals, while caesium has the highest melting point. This trend is due to the increasing strength of metallic bonding as atomic size increases down the group.
What is the general trend of the melting points of hydrides across the period?
The general trend of the melting points of hydrides across a period is that they decrease from left to right. This is because the electronegativity of the atoms increases across a period, resulting in stronger hydrogen bonding and lower melting points.
Which trend decreases for metals down a group atomic radiusreactivity or melting point?
Melting points generally decrease as you go down a group for group I and group II metals. This does not apply to the transition metals. Reactivity of metals increases down a group due to a larger size and less effective charge between the nucleus and valence electrons. Atomic radius increases due to a higher principle number of electrons.
Name two elements that are side by side on the periodic table that do not reflect the general trend in melting points for the periods?
One example of two elements that are side by side but do not follow the general melting point trend for the period are sodium (Na) and magnesium (Mg). Sodium has a lower melting point than magnesium, even though it is located to the left of magnesium on the periodic table.
