Which subatomic particle or particles are found in a "cloud" outside of the nucleus?
a. protons
b. neutrons
c. electrons
d. protons and neutrons

c. electrons

Explanation:

Using the method of elimination;

Option a - This is incorrect because the protons reside in the nucleus of the atom.

Option b - This is incorrect because the neutrons reside in the nucleus of the atom.

Option c - This is correct because Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus.

Option d - This is incorrect beacuse both the protons and the neutrons resie in thr nucleus of an atom

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

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