Answer:
Ba3(PO4)2
Explanation:
since it's created by giving or taking electrons
B) some planets revolve backwards
Answer: Option (c) is the correct answer.
Explanation:
A positron is denoted as 
, a neutron is denoted as 
, an electron is denoted as 
, and a proton is denoted as 
.
Therefore, when 
will decay into 
this means there occurs decrease in its mass number. Hence, it means a neutron will be releasing during this reaction.
The reaction will be as follows.
A) if you have a period table handy it’s the number in the top left hand corner of the element
