What group and period is selenium?
Fact box
| Group | 16 | 220.8°C, 429.4°F, 494 K |
|---|---|---|
| Period | 4 | 685°C, 1265°F, 958 K |
| Block | p | 4.809 |
| Atomic number | 34 | 78.971 |
| State at 20°C | Solid | 80Se |
Do groups go across periods go up and down?
Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.
What are the trends for periods rows in the periodic table?
Periods are the horizontal rows of the periodic table. There are seven periods total and each element in a period has the same number of atomic orbitals. The top period, which contains hydrogen and helium, has only two orbitals. As you go down the rows, the number of orbitals increases.
What is the relationship between groups and periods?
The columns of the periodic table are called groups. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type. The horizontal rows are called periods.
What is the group name of selenium?
Group 6A (or VIA) of the periodic table are the chalcogens: the nonmetals oxygen (O), sulfur (S), and selenium (Se), the metalloid tellurium (Te), and the metal polonium (Po).
When we go down the group in a periodic table there is gradual change in?
When we go down the group in a periodic table there are a gradual change in [C] Both physical and chemical properties change when we go down the group in a periodic table. This is caused due to the change in Atomic Number assigned to each element according to the Modern Periodic Table.
What property decreases from left to right across the periodic table?
Solution : Atomic number and metallic character decreases from left to right across the period and increases from top to bottom down the group.
What are the 4 trends of the periodic table?
There are four main periodic trends: electronegativity, atomic size, ionization energy, and electron affinity.
What are group trends?
Group Trend: as you go down a column, atomic radius increases. Periodic Trend: as you go across a period, (L to R), atomic radius decreases. Ionization Energy Trends. Group Trend: as you go down a column, ionization energy decreases.
What is the basic difference between a group and a period in terms of electronic configuration?
1 Answer. In a group, though the number of shells increases as we move downward, but the number of electrons in the outermost shell remains the same. In a period, as we move from left to right, the outermost shell or valence shell gets progressively filled from group 1 to group 18 and the shell does not change.
What does the period number tell you?
The period number on the Periodic table tells you the total number of orbits that the atom will have. In other words, the period number indicates the number of energy levels (or energy orbit) of an atom.
What element is in Group 6 Period 2?
What elements is in Group 4 Period 5?
The symbol of the element in Group 4 and Period 5 is Zr. It is the symbol of Zirconium.
What is selenium on the periodic table?
selenium (Se), a chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied in chemical and physical properties with the elements sulfur and tellurium. Selenium is rare, composing approximately 90 parts per billion of the crust of Earth.
When we go down the group in a periodic table which property shows variation?
Radius increases as we move down a group, so Ge < Fl (Note: Fl is the symbol for flerovium, element 114, NOT fluorine).
Which decreases on moving from left to right in a period?
Metallic character decreases as you move across a period in the periodic table from left to right.
What are 3 trends in the periodic table?
Periodic trends are patterns in elements on the periodic table. Major trends are electronegativity, ionization energy, electron affinity, atomic radius, and metallic character.