My question is what is a atom? this is for science

How many lone pairs are on the central atom in BCl3

Which statement correctly evaluates the results of the report? It is likely to be reliable because the tests were done in a laboratory. It is likely to be reliable because the results support the conclusion presented.

Mercury reacts with oxygen to form mercuric oxide. Is this a combustion reaction?|

If dynamite explodes what type of chemical reaction is it?

A. 35 m solution of weak acid, HX, has a h + of 4.15*10^-3. what is the value of ka for this acid

What will happen if the density of an object is less than the density of water?

Which cannot be separated into simpler substances? compound element solution mixture

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?