The most likely element is silver

in second place is copper

**Answer:**

**Explanation:**

The answer is neutrons and protons. The proton for example is composed of 3 quarks with charges of 2/3 + 2/3 - 1/3 which gives an overall charge of 1.

Neutron are composed of 2 quarks that are - 1/3 in charge and 1 that has a charge of 2/3. The overall charge is 0.

In order to answer these questions, we need to know the charges on

the electron and proton, and then we need to know the electron's mass.

I'm beginning to get the creepy feeling that, in return for the generous

5 points, you also want me to go and look these up so I can use them

in calculations ... go and collect my own straw to make the bricks with,

as it were.

Ok, Rameses:

Elementary charge . . . . . 1.6 x 10⁻¹⁹ coulomb

negative on the electron

plussitive on the proton

Electron rest-mass . . . . . 9.11 x 10⁻³¹ kg

a). The force between two charges is

F = (9 x 10⁹) Q₁ Q₂ / R²

= (9 x 10⁹ m/farad) (-1.6 x 10⁻¹⁹C) (1.6 x 10⁻¹⁹C) / (5.35 x 10⁻¹¹m)²

= ( -2.304 x 10⁻²⁸) / (5.35 x 10⁻¹¹)²

= **8.05 x 10⁻⁸ Newton** .

b). Centripetal acceleration =

v² / r .

A = (2.03 x 10⁶)² / (5.35 x 10⁻¹¹)

= ** 7.7 x 10²² m/s² .**

That's an enormous acceleration ... about 7.85 x 10²¹ G's !

More than enough to cause the poor electron to lose its lunch.

It would be so easy to check this work of mine ...

First I calculated the force, then I calculated the centripetal acceleration.

I didn't use either answer to find the other one, and I didn't use " F = MA "

either.

I could just take the ' F ' that I found, and the 'A' that I found, and the

electron mass that I looked up, and mash the numbers together to see

whether F = M A .

I'm going to leave that step for you. Good luck !