Atoms Review 2

Which of these has a positive charge?

• proton

• neutron

• electron

• protons and neutrons

Which of these has a negative charge?

• proton

• neutron

• electron

• protons and neutrons

Which of these has a neutral charge?

• proton

• neutron

• electron

• protons and neutrons

Protons and neutrons are found in the nucleus; therefore the nucleus of the atom would have what overall charge?

• positive

• neutral

• negative

• depends on the atom

Which element is shown in the Bohr model?

• Helium because it has 2 valence electrons

• Magnesium because it has an atomic number of 12.

• Chromium because is has an atomic mass of 24.

• Argon because it has 18 total subatomic particles.

Which statement is best used to identify the Bohr model as Aluminum?

• It has 13 protons.

• It has 3 valence electrons.

• It has 3 energy levels.

• It has 14 neutrons.

Which of these best describes an electron?

• It has no charge and about the same mass as a proton.

• It has a negative charge and much less mass than a proton.

• It has a positive charge and much more mass than a neutron.

• It has a negative charge and about the same mass as a neutron.

 What is at the center of every atom? 

• nucleus
• neutron
• proton
• all of these 

The atomic number is determined by...     

• The number of protons
• The number of neutrons
• None of these

The smallest common particle in the atom...   

• electron
• proton
• nucleus 
• neutron