In an alpha decay, an atom emits an alpha particle. An alpha particle consists of 2 protons and 2 neutrons: this means that during this kind of decay, the original atom loses 2 protons and 2 neutrons from its nucleus.
This also means that the atomic number Z of the element (the atomic number is the number of protons in the nucleus) decreases by 2 units in the process, while the mass number A (the mass number is the sum of the number of protons and neutrons) decreases by 4 units.
Answer:False.
Explanation: HIV is a viruse that only shows symptoms after a few weeks. in Fact HIV does not show any physical symptoms. So, no you can not tell if someone has or is been infected by HIV by directly looking at them.
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Answer:
Explanation:
From the question we are told that:
Radius 
Charge Density 
Distance 
Generally the equation for electric field is mathematically given by
Answer:
60a in a circuit with a 12v battery
Explanation:
60a in a circuit with a 12v battery
The width of the playroom is 4 m
