Which of the following is NOT TRUE about alpha emissions?

Result in new element whose mass number is two units less than the old element

Less penetrating than beta emissions

Most common in elements with atomic number 83

Written as 42He

Question

Which of the following is NOT TRUE about alpha emissions?
 	
	
Result in new element whose mass number is two units less than the old element
	
Less penetrating than beta emissions
	
Most common in elements with atomic number > 83
	
Written as 42He

anonymous · Answer

The "42He" looks like $$^42He$$