Atomic Structure (Nuclear notation only)

Which of the following is unique for any given element?

• the number of neutrons
• the charge on the electrons
• the number of protons
• the mass of a neutron

Which statement is true about ¹⁷₈O and ¹⁸₈O?

• They do not have the same number of protons.
• Their atoms have an identical mass.
• They are isotopes of oxygen.
• The have the same mass number.

An atom has 10 protons and a mass number of 18. It has __ neutrons

• 10
• 18
• 28
• 8

What is different about isotopes of the same element?

• # of protons
• # of electrons
• # of neutrons

What subatomic particles are found in the nucleus of an atom?

• neutron and electron.
• neutron and proton.
• proton and electron. 

Particles in an atom that are neutral and have no charge are ______. 

• Negatrons 
• Electrons 
• Neutrons 
• Protons 

The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is _____.

• 12.5
• 13
• 25
• 37

Tags

NGSS.MS-PS1-1

The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.

• 9
• 10
• 19
• 28

Tags

NGSS.HS-PS1-1

If the number of electrons in an atom changes you make a(n) __________________.

• ion
• isotope
• new element
• isomer

How many neutrons does ²³⁹₉₂U     have?

• 92
• 147
• 239
• 331