Structure of an Atom

What is the atomic number?

• number of protons

• number of neutrons

• number of electrons and neutrons

• number of proton and neutrons

Which statement best describes an electron?

• Smaller mass than a proton and a negative charge
• Smaller mass than a proton and a positive charge
• Greater mass than a proton and a negative charge
• Greater mass than a proton and a positive charge

Tags

NGSS.MS-PS2-3

Which of the following subshell designations does not exist?

• 2d

• 2p

• 3s

• 3p

Identify the electron configuration of noble gas.

• 1s² 2s² 2p⁶

• 1s² 2s²

• 1s² 2s² 2p³

• 1s² 2s² 2p⁶ 3s¹

Oxygen’s atomic number is 8. This means that an oxygen atom must have

• 8 electrons
• 8 protons
• 8 neutrons
• a mass number of 8

Tags

NGSS.MS-PS1-1

What is the role of an electron in an atom?

• Electrons live inside the nucleus and carry a neutral charge.
• Electrons circle the nucleus and have a positive charge.
• Electrons circle the nucleus and have a negative charge.
• Electrons live inside the nucleus and have a negative charge.

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

What is found in the nucleus of an atom?

• Protons

• Electrons

• Protons and Electrons

• Protons and Neutrons

What is an atomic mass?

• The total number of electrons in an atom

• The total number of neutrons in an atom

• The total number of protons and electrons in an atom

• The total number of protons and neutrons in an atom