<h2>Answer 1:</h2>
Products and reactants combine to form new substances.
Explanation:
In a chemical reaction, substances called reactants are changed into other substances called products. We can't change one element into another in a chemical reaction, just the chemical properties of the new substance are changed.
<h2>Answer 2:</h2>
Energy was released.
Explanation:
An increase in heat increase in the vibrational energy of the atoms, or molecules of a substance. So increasing the temperature and hence the heat, there is more movement (vibration) in the atoms which translates to more kinetic energy and energy is released.
<h2>Answer 3:</h2>
Energy was absorbed.
Explanation:
When the temperature during a chemical reaction is decreased, the kinetic energy of the molecules decreases and therefore energy is absorbed which means more energy is required to break the inter molecular bonds among the atoms.
<h2>Answer 4:</h2>
This atom is very likely to bond with another atom.
Explanation:
According to the Octet Rule, every atom wants to complete its outermost shell with 8 electrons. Since Cl atom has 7 electrons in its last shell so it is obviously it an unstable state and it will form bond with group 1st elements such as Na that is why we see that NaCl is a very stable substance.
<h2>Answer 5:</h2>
The arrangement and types of atoms
Explanation:
Actually the chemical properties of a substance are related to the arrangement of atoms in an element but the physical properties of elements are related to the types of atoms.
<h2>Answer 6:</h2>
This atom is not likely at all to bond with another atom.
Explanation:
Neon is an inert gas or Nobel Gas and noble gases are those gases whose outermost shell is complete therefore they do not want to react with other elements because they are already in stable form.
<h2>Answer 7:</h2>
Formation of a gas
Explanation:
The chemical reaction depends upon the change in chemical properties of element and not the physical properties only. Boiling, freezing and melting are the physical changes of a substance but the formation of a gas shows that a new gas is formed by the reaction of two or more than two substances.
<h2>Answer 8:</h2>
Energy is released by the reaction.
Explanation:
An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction which is the absorption of energy. Exothermic reaction can be expressed in a chemical equation as:
reactants → products + energy
<h2>Answer 9:</h2>
Bonds were broken on the reactants and new bonds were formed on the products.
Explanation:
We can see that there are two types of elements: Red and Black. On the reactants side we see that there are bonds between similar atoms but on the right hand side they are mixed i.e red mixed with black so it means that new bonds were formed.
<h2>Answer 10: </h2>
The atom is not likely to bond with another atom, as it has a full outer shell of valence electrons.
Explanation:
Argon is an inert gas and inert gases are those gases which do not react with other elements and the reason behind this is that they have already got their outermost shell completed.
<h2>Answer 11:</h2>
A chemical reaction produced a gas.
Explanation:
Pickle juice has vinegar inside it and vinegar is acetic acid so the first reaction is the acid-base reaction. When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The carbonic acid formed as a result of the first reaction immediately begins to decompose into water and carbon dioxide gas.
<h2>Answer 12:</h2>
Energy was released during the reaction.
Explanation:
Energy was released during the reaction because the slope is going down and is in the negative direction with the passage of time.
