The question is incomplete. No options are given (for which of the following) to answer the question.
Generally speaking, molecular, or covalent compounds are formed when two non-metals bond together.
A compound is defined as a substance that contains at least two chemical elements and always has a constant mass ratio between elements for each possible pair of the elements that are present in it.
No. Since BH3 lacks a lone pair it would be a Lewis acid.
ClO4 is not a compound, it exists as ClO4-, which is a polyatomic ion called the perchlorate ion. Some positive ion such as potassium or ammonium must be present to balance the charge and form a compound.
Yes, the compound known as CS2 is considered nonpolar. This is because it cannot have any dipole moments due to having a symmetrical molecular geometry.
No, they are both halogens and nonmetals with a electronegativity too close together to form an ionic bond. They, if ever bonded, would form a covalent, or polar covalent bond.
K and Br are most likely to form a chemical compound.
elements that may form a compound, are elements that are different from each other, and they also have to be more than 1 element to combine, and create.
A compound is defined as a substance that contains at least two chemical elements and always has a constant mass ratio between elements for each possible pair of the elements that are present in it.
BaCl2
No. Since BH3 lacks a lone pair it would be a Lewis acid.
the empirical formula of a compound tells you the proportions of the elements in the compound. with that information you can make some inferences about the identity of the compound. for example a compound with an empirical formula CH4 tells us that for every carbon atom there are four hydrogen atoms. this means that the compound is methane because no other hydrocarbon can have these roportions (try drawing the lewis structure for C2H8, which doesnt exist. you cant!)
Na and Cl, Mg and O
Mg and F are the only pair here that will form an ionic compound.
Any atom (or ion) or compound that can accept a pair of electrons to form a covalent bond.
its polar found by smiley
Carbon (C) and Oxygen (O) together they can form: (CO) carbon monoxide (CO2) carbon dioxide (CO3) carbon trioxide For elements to bond covalently, they both need to be non-metals.
Trigonal pyramidal (see wikipedia article "Trigonal pyramidal molecular geometry" for a picture. In terms of VSEPR it is an AX3E compound so the three N-H bonds and the lone pair are approximately tetrahedrel- but as the lone pair repels a little more the bond angle is less than 109.50 at 1080