B solvent because it is socking in
        
                    
             
        
        
        
Rows of elements are called periods. The period number<span> of an element signifies the highest unexcited energy level for an electron in that element.
</span>Columns of elements help define element groups<span>. </span>Elements within a group share<span> several common properties. Groups are elements have the same outer electron arrangement.</span>
        
             
        
        
        
In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
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Answer:
V of Sulfur tetrafluoride is  17.2 L
Explanation:
Given data;
T = -6°C =  267K                                [1° C  = 273 K]
n = 786 mmol of SF4 which is 0.786 mol
P = 1 atm
from ideal gas law  we have
PV = nRT
where n is mole, R is gas constant, V is volume


V of Sulfur tetrafluoride is  17.2 L
 
        
             
        
        
        
Isotopes are elements that differ in the number in neutrons while the numner of protons are the same. The answers of the questions are: 1) 18/8 O 2) 22/10 Ne 3) 53/25 Mn 4) 37/24 Cr 5) 106/81 Ti.