What is the trend in melting points?
Different groups exhibit different trends in boiling and melting points. For Groups 1 and 2, the boiling and melting points decrease as you move down the group. For the transition metals, boiling and melting points mostly increase as you move down the group, but they decrease for the zinc family.
Does the melting point increase across a period?
Melting and boiling points increase across the three metals because of the increasing strength of their metallic bonds. The number of electrons which each atom can contribute to the delocalized “sea of electrons” increases. The atoms also get smaller and have more protons as you go from sodium to magnesium to aluminum.
What is the trend of melting point and boiling point?
Melting points and boiling points of Group 1 metals A trend can also been seen on descending a group. The melting and boiling points of the Group 1 elements decrease on descending the group. This is due to a decrease in the forces of attraction between the atoms.
Which element has more valence electrons neon or oxygen?
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr). Oxygen, like all the other elements in group 16, has six valence electrons.
Which information would best fill the blanks in Row 3?
Answer: covalent bond and low melting point- 3.
Which reason best explains why metals are shiny quizlet?
Explanation: It is known that metals have free electrons. These free electrons when come in contact with light, vibrate or oscillate at their respective position. As a result, the electrons gain small amount of energy and when this energy is released the surface of metal shines.
Which statement best describes the properties of metals they are shiny and bend without breaking?
The correct option is A. Metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. The malleability of metals refers to their ability to withstand bending and hammering without breaking.
Which reason best explains why metals are ductile instead of brittle?
Metals are ductile instead of brittle because they have flexible bonds. Metals have a property called ductility. It is the ability of a metal to be drawn into wires. Metals due to greater bond flexibility are more ductile.
Which is the best metal to use in an alloy to increase?
Thus, out of the given options we can conclude that copper (Cu) is the best metal to use in an alloy to increase its electrical conductivity.
Which property does a metal with a large number of free?
Answer Expert Verified. A metal with a large number of free-flowing electrons most likely has good conductivity. A good conductivity means that an element possessed a high capability to relay energy with a form of electricity. The electrical conductivity process involves free-flowing electron through a solid form.