Atomic Structure

Which statement best describes the nucleus of an atom?

• It is a centrally located structure comprising almost all of the atomic mass and having an overall neutral charge

• It is a centrally located structure comprising almost none of the atomic mass and having an overall positive charge

• It is located in the electron cloud, comprises almost all of the atomic mass, and has a positive charge

• It is a centrally located structure comprising almost all of the atomic mass and having an overall positive charge

Am element has 27 protons, 27 electrons, and 32 neutrons. Calculate the atomic mass of this element.

• 59

• 54

• 86

• 32

Tags

NGSS.MS-PS1-1

If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the charge of the nucleus?

• +12

• -13

• -12

• +13

Which section of the Venn diagram represents the contents of the nucleus?

• IV

• V

• VII

• VI

Tags

NGSS.MS-LS1-2

Which diagram correctly describes the structure of a fluorine atom?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

An electron is approximately 0.05% of the mass of a proton. Protons and neutrons each have a mass of 1 amu. Which of the following best describes the relationship between mass and subatomic particles?

• The mass of an electron is equal to that of a neutron

• Atomic mass is the total number of protons and electrons

• A neutron has 0.05% more mass than an electron

• The nucleus comprises over 99% of the atom's mass

A student is given two diagrams, a neutral copper atom and a neutral mercury atom. Which statement best describes the difference in the number of electrons for these two atoms?

• Copper has 29 less electrons than mercury

• Mercury has 51 more electrons than copper

• Copper has 51 more electrons than mercury

• Mercury has 29 less electrons than copper

Which subatomic particles make up the mass of an atom?

• 1 only

• 1 and 3 only

• 3 only

• 2 and 3 only

Tags

NGSS.MS-PS1-1

Which subatomic particle is attracted to the nucleus?

• Proton

• Neutron

• Electron

• None of the above

How can a student use the diagram to calculate the atomic mass for the helium atom?

• Add G and K to determine the atomic mass for helium

• Subtract L from G to determine the atomic mass for helium

• Add G and H to determine the atomic mass for helium

• Add G and L to determine the atomic mass for helium

Tags

NGSS.MS-PS1-1