Answer:the first one is D second one is A and the third one is A :D
Explanation:
Chlorine-36 has been widely used for dating old groundwater.
<h3><u>Answer;</u></h3>
C. An electron has a high probability of being in certain regions.
<h3><u>Explanation;</u></h3>
- <em><u>Electron cloud model tells us that electrons are found in defined energy states in outside of the nucleus of the atom. The lowest possible state for any electron is called its ground state. </u></em>
- The energy levels can only hold a certain number of electrons at any time and the organizations of these electrons in the electron cloud called the atom's electron configuration.
- Energy levels describe distances from the nucleus in which electrons can be found. There is a maximum number of electrons that can be found at any particular energy level due to limitations of its size.
<u>Explanation:</u>
<u>Similarity between the two:</u>
Molecular formula and structural formula gives the exact number of atoms of different chemical elements that are present in a compound.
<u>Difference between the two:</u>
Structural formula gives us the relative positions of the atoms that are present in a compound whereas molecular formula does not give us the relative positions of the atoms. But it gives us the ratio of atoms in a given compound.
Answer:
the catalyst is the two gray dots