Structure of Atoms

What can be found from the total of the subatomic particles in the nucleus?

• atomic number

• atomic mass

• number of electrons

• charge of the nucleus

Select all the answers that relate to the nucleus.

• Has an overall positive charge.

• Has particles with no mass and no charge.

• Has particles with mass and a positive charge.

• Has little volume but lots of mass.

Which of the following is true about an atom of Aluminum (Al) based on the model?

• has an overall positive charge

• contains 13 electrons

• has a mass of 27

• has an atomic number of 14

Tags

NGSS.MS-PS1-1

What will always be true of an atom of iron (Fe)?

• 26 neutrons

• 56 electrons

• 26 protons

• 30 electrons

What element does this atom represent?

• Lithium (Li)

• Nitrogen (N)

• Beryllium (Be)

• Aluminum (Al)

Tags

NGSS.MS-PS1-1

What is a limitation of the of a Bohr Model?

• It shows the nucleus in the middle.

• It shows the electrons in different energy levels.

• It shows the electrons stuck at a location.

• It shows the number of valence electrons.

Which of the following is the smallest particle that has the properties of an element?

• an electron of carbon

• a proton of hydrogen

• an atom of sodium

• a neutron of helium

Select all the statements that are true.

• Electrons have a negative charge & more mass than a proton.

• Neutrons are negative & have more mass than electrons.

• Protons are positive & have more mass than an electron.

• Protons & neutrons have the same mass.

Tags

NGSS.MS-PS1-1

Which of the following would not be reactive?

• Neon with 8 valence electrons.

• Sodium with 1 valence electrons.

• Oxygen with 8 total electrons.

• Boron with 5 total electrons.

In a model of an atom, what particle is responsible for the identity of an atom?

• protons

• valence electrons

• neutrons

• nucleus

Tags

NGSS.MS-PS1-1