For the representative elements (main group elements), atomic radius generally decreases from left to right across a period.
Example:
B and Fl: Fl has the smaller atomic radius
Li and Be: Be has the smaller atomic radius
This element is tellurium with a covalent atomic radius of 140 pm.
Selenium (Se) is in oxygen family (group 16 or VIA) and in 4th period.
Selenium is a nonmetal element that belongs to the oxygen group of the periodic table. Its atomic number is 34, and it has multiple allotropes with different physical and chemical properties. Selenium exists in various forms, including elemental selenium, selenide ions, selenite ions, and selenate ions.
It is not hydrogen so it must be nitrogen and bromine since it has a higher atomic radius.
the element that has an atomic mass of 16.00 is sulfer.
This element is tellurium with a covalent atomic radius of 140 pm.
Carbon vs. Oxygen: Oxygen has atoms with a larger atomic mass. Sodium vs. Magnesium: Magnesium has atoms with a larger atomic mass. Phosphorus vs. Sulfur: Sulfur has atoms with a larger atomic mass.
Selenium (Se) is in oxygen family (group 16 or VIA) and in 4th period.
Selenium is a nonmetal element that belongs to the oxygen group of the periodic table. Its atomic number is 34, and it has multiple allotropes with different physical and chemical properties. Selenium exists in various forms, including elemental selenium, selenide ions, selenite ions, and selenate ions.
It is not hydrogen so it must be nitrogen and bromine since it has a higher atomic radius.
Oxygen is a non metal element with atomic number of 8.
the element that has an atomic mass of 16.00 is sulfer.
The atomic mass of Oxygen is 15.9994.
Oxygen is less dense than selenium. Oxygen has a density of about 1.43 grams per cubic centimeter, while selenium has a density of about 4.81 grams per cubic centimeter.
Cesium has a larger atomic radius than rubidium. This is because as you move down a group in the periodic table, the atomic radius generally increases due to the addition of more energy levels and electrons.
Oxygen is a gas element. atomic number of it is 8.
Oxygen is a metal element. Atomic mass of it is 16.