What are the properties of Period 3 elements?
Properties of Period 3 Elements
| Name of Element (Symbol) | Sodium (Na) | Aluminium (Al) |
|---|---|---|
| 1stIonization Energy (kJ mol-1) | 502 | 584 |
| Electronegativity (Pauling) | 0.93 | 1.61 |
| Melting Point (°C) | 98 | 660 |
| Boiling Point (°C) | 883 | 2467 |
What properties increase across Period 3 of the periodic table?
Melting and boiling points rise across the three metals because of the increasing strength of the metallic bonds. The number of electrons which each atom can contribute to the delocalised “sea of electrons” increases. The atoms also get smaller and have more protons as you go from sodium to magnesium to aluminium.
What are the properties of the periods on the periodic table?
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
Which element of Period 3 has Valency 4?
Answer is Silicon . Its atomic number is 14. The electronic configuration is 2,8,4 . It requires 4 electrons to complete its octet thus it show a valency of 4.
Which element of period 3 has the largest radius?
Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period.
Which element in period 3 on the periodic table is a metalloid?
Silicon
Silicon. Silicon (symbol Si) is a group 14 metalloid. It is less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table, but more reactive than germanium, the metalloid directly below it in the table.
What is Group 2 period 3 on the periodic table?
Hence the name of the element is magnesium.
Why third period has only 8 elements not 18?
According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.
Which is the highest electron affinity?
Chlorine
Chlorine has the highest electron affinity among the elements. Its high electron affinity can be attributed to its large atomic radius, or size. Because chlorine’s outermost orbital is 3p, its electrons have a large amount of space to share with an incoming electron.
What elements are in the third period?
The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block. All of the period 3 elements occur in nature and have at least one stable isotope.
What are the periods of the periodic table called?
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
What is 30 on the periodic table?
Zinc, sometimes called spelter, is a chemical element. It is a transition metal, a group of metals. It is sometimes considered a post-transition metal. Its symbol on the periodic table is ” Zn “. Zinc is the 30th element on the periodic table, and has an atomic number of 30. Zinc has a mass number of 65.38.
What is the number of periods on the periodic table?
There are currently seven complete periods in the periodic table, comprising the 118 known elements. Any new elements will be placed into an eighth period; see extended periodic table. The first period contains the least elements than any other, with only two, hydrogen and helium.