I'm not an expert (I'm 11 years old) but I'm very sure Carbon (C), Radium (Ra), Oxygen (O) and Yttrium (Y). Carbon can be found in column 4a, Radium in column 2a, Oxygen in column 6a and Yttrium in column 1b which if you didn't know, comes after the row 2a (have a labeled column Periodic Table to understand this)
I hope you find this of help =)
Yttrium can form bonds with a variety of elements, including oxygen, carbon, nitrogen, and sulfur. It often forms strong bonds with oxygen to create oxides, such as yttrium oxide (Y2O3). Yttrium can also form compounds with other metals, such as yttrium iron garnet (Y3Fe5O12).
Hydrogen, oxygen, nitrogen, carbon, sulphur
Fluorine is the most electronegative element among nitrogen, oxygen, carbon, and fluorine. It has the highest electronegativity value on the periodic table.
Mainly carbon, nitrogen, hydrogen and oxygen.
No, it is not. It is a compound, not an element. RNA contains carbon, nitrogen, hydrogen, oxygen, and phosphorus.
Hydrogen, Helium, Oxygen, Nitrogen, Xenon, There are plenty to choose from, just look along the right-hand side of the periodic table
No. Carbon, nitrogen, and oxygen are separate elements.
The only element out of those listed which is on the same row of the periodic table as phosphorus is magnesium.
Carbon dioxide is chemical compound. Oxygen and nitrogen are chemical elements.
Anything to the right of the step-like line.
Non-metals are on the right side of the periodic table. Carbon, nitrogen, oxygen, fluorine, sulfur, etc are nonmetals.
If "heavier than" in the question is interpreted to mean "has an atomic mass greater than", the answer is nitrogen