when six protons and six neutrons unite to form a carbon atom, the net mass of the 12 nucleides decreases?

Question

slightly. This __________ multiplied by _______ equals the nuclear binding energy of arbon 12.

A: mass defect, the atom's mass.
B: mass difference, mc^2
C: mass defect, mc^2
D: mass difference, the atom's mass

If you pass radiation between two charged plates, which two kinds of radiation emissions willbe attracked and bent toward a negative plate?

A: Positrons and alpha particles
B: Beta particles and gamma rays
C: Gamma rays and positrons
D: Alpha particles and Beta particles

I have done all my homework myself, I am just stuck with these 2 questions, so please no answers telling me to do it myself

Answer 1

First question: C (except the "m" should not be there since it is the answer for the first blank you filled in).
Nuclear binding energy is calculated by multiplying the change in mass (or mass defect) by the speed of light squared.

Second question: A
Positrons and alpha particles both have a positive charge. These positive charges will be attracted to the negative electric plate and their path will be bent toward the negative plate.

Answer 2

Carbon-12

Answer 3

I'm going to go with C for the first one, but do yourself a favor and look it up here, cause im not sure myself ...http://en.wikipedia.org/wiki/Mass_difference

The second question the answer is which particles are positively charged. If you cross out the photon radiation, the neutral particles and the negatively charged particles you should end up with just the ones you need. thats Positrons and alpha particles. so A is your answer.

Answer 4

1. C

2. A