What cause a comet to look like it has a tail trailing behind it

When a fluorine atom reacts with a chlorine atom, the bond that forms between them should be ionic covalent. nonpolar covalent. ionic. polar covalent.

Element A has one valence electron. How does its reactivity compare to that of element B, which has four valence electrons? A) Element A is more reactive. B) Element A is less reactive. C) Element A and B have the same reactivity.

Lewis model hydrogen and nitrogen

How many moles of mgs2o3 are in 229 compound?

How many neutrons does sodium have? What is the chemical symbol for sodium? How many protons does sodium have? How many electrons does it have in the n = 2 orbit?

A molecule from a new organism contains adenine, cytosine, guanine, and thymine. What molecules is being looked at?

In what pH range does phenol red change from yellow to pink

Given the generic chemical reaction below write the rate of the reaction

23 For a reaction at equilibrium, which change can increase the rates of the forward and reverse reactions?

If the formula for potassium chlorate is KClO3 and the formula for magnesium fluoride is MgF2, then what isthe formula for magnesium chlorate?