Atoms that carry an electric charge because they gained or lost electrons are called ions.
        
                    
             
        
        
        
Answer:
<em>a= In scientific notation</em>
6.96×10⁵ Km
<em>b =In  expanded notation</em>
0.00019 mm
Explanation:
Given data:
Radius of sun = 696000 Km
size of bacterial cell = 1.9 ×10⁻⁴ mm
Radius of sun in scientific notation = ?
Size of bacterial cell in expanded notation = ?
Solution:
Radius of sun:
696000 Km
<em>In scientific notation</em>
6.96×10⁵ Km
Size of bacterial cell:
1.9 ×10⁻⁴ mm
<em>In  expanded notation</em>
1.9/ 10000 = 0.00019 mm
 
        
             
        
        
        
The half-life of the carbon-14 isotope is used in dating fossils in a process called radiocarbon dating. 
hope this is adequate. 
        
             
        
        
        
Answer: Too much base was added 
i guessed
Explanation: