Question

atoms consist of a positively charged center called a(n) __________. * 2 points
proton
neutron
electron
nucleus

the negative charged particles outside the nucleus of an atom are __________. * 2 points
extracellular material
electrons
neutrons
quarks

which of the following atomic particles is electrically neutral? * 2 points
neutrons
protons
electrons
positrons

Explanation:

1. Atoms have a positively - charged center called the nucleus which contains protons and neutrons. Protons are positively charged, neutrons are neutral, and electrons are negatively charged and are outside the nucleus.
2. Electrons are the negatively - charged particles outside the nucleus of an atom.
3. Neutrons have no electric charge, protons are positively charged, electrons are negatively charged, and positrons are positively charged (antiparticles of electrons).

Answer:

1. D. nucleus
2. B. electrons
3. A. neutrons