Answer: option C) Na, Mg, K
Explanation:
Similar chemical properties are expressed by elements found in the same or close groups. There are Seven (7) groups in the Periodic table.
Of all the options, ONLY sodium Na, Magnesium Mg, and Potassium K, are located in closely together with SODIUM and MAGNESIUM being in the Same period, while SODIUM and POTASSIUM are placed in the same Group 1.
Therefore, Na, My, and K are most similar in chemical properties
Answer:
Both metals and non metals.
Explanation:
The correct formula of baking soda is NaHCO₃,
An element is considered to be metal if it is able to give electron easily due to very low ionization energy.
A non metal is ready to accept electron easily due to high electron affinity.
In sodium bicarbonate :
Na: Sodium : metal
H : Hydrogen: non metal (although placed with first group, alkali metals, in the periodic table as it readily loses electron like metals)
C: Carbon: Non metal
O : Oxygen : Non metal.
So the compound contains both metals and non metals.
Answer:
The value of entropy change for the process
Explanation:
Mass of the ideal gas = 0.0027 kilo mol
Initial volume = 4 L
Final volume = 6 L
Gas constant for this ideal gas ( R ) =
Where = Universal gas constant = 8.314
⇒ Gas constant R = 8.314 × 0.0027 = 0.0224
Entropy change at constant temperature is given by,
Put all the values in above formula we get,
This is the value of entropy change for the process.