Question: Which statement best describes the electrons in this illustration?

Answer: The electrons are negatively charged particles located outside the nucleus.

Question: What is the most basic building block of matter?

Answer: the atom

Question: Which part of an atom has a negative charge?

Answer: electron

Question: What best describes the mass of an electron?

Answer: not significant to the overall mass of the atom

Question: How many protons are in this atom if it has a balanced charge?

6 red mixed with 6 blue

2 negatives on left and right

1 negative at the top and bottom.

Answer: 6

Question: What does the electron cloud model describe?

Answer: location where an electron has the highest probability of being found

Question: What is the atomic number of an oxygen atom with 8 protons and 10 neutrons in its nucleus?

Answer: 8

Question: What happens if an atom loses a neutron?

Answer: Its mass is lowered, but it is still the same element.

Question: Which term is defined as a substance that cannot be broken down chemically into a simpler substance?

Answer: element

Question: Which term is defined as the sum of protons and neutrons in an atomic number?

Answer: mass number