describe the bond formed between two atoms with similar, low electronegativities. is it more covalent or ionic?

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

What is the mass of 4 molecules of co2

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line