Answer:
All the given elements belong to the second period of the periodic table
Explanation:
Let's locate the elements with the given atomic numbers:
- Z = 3, this corresponds to lithium (Li);
- Z = 4, this corresponds to beryllium (Be);
- Z = 5, this corresponds to boron (B);
- Z = 6, this corresponds to carbon (C);
- Z = 7, this corresponds to nitrogen (N);
- Z = 8, this corresponds to oxygen, (O);
- Z = 9, this corresponds to fluorine, (F).
Now notice that each of these 9 elements can be found in the same row of the periodic table. This is period 2. We may then summarize that all of these elements belong to the same period, period number 2.
Answer:
Increase the amount of charge on each object
Decrease the distance between each object
Increase the mass of the objects.
The given question is incomplete. The complete question is:
The change in entropy is related to the change in the number of moles of gas molecules. Determine the change in moles of gas for each of the reactions and decide if the entropy increases decreases or has little to no change:
A.
B.
C.
D.
Answer: A. : decreases
B. : decreases
C. : no change
D. : increases
Explanation:
Entropy is defined as the randomness of the system.
Entropy is said to increase when the randomness of the system increase, is said to decrease when the randomness of the system decrease and is said to have no change when the randomness remains same.
In reaction , as gaseous reactant is changed to solid product, entropy decreases.
In reaction , as 4 moles of gaseous reactants is changed to 2 moles of gaseous product, entropy decreases.
In reaction , as 3 moles of gaseous reactants is changed to 3 moles of gaseous product, entropy has no change.
In reaction , as 1 mole of gaseous reactant is changed to 3 moles of gaseous product, entropy increases.
Strong acids are completely ionised and weak acids are partly ionised