Atomic structure and isotopes

What is the charge on a proton?

• +1

• 0

• -1

• 1

Tags

NGSS.HS-PS2-4

What is the mass of a neutron?

• 0

• 1

• 2

• almost 0

Tags

NGSS.HS-PS1-8

What is the charge on a neutron?

• +1

• 0

• -1

• 1

What is the mass of an electron?

• 0

• 1

• 2

• almost 0

What is the charge on an electron?

• +1

• 0

• -1

• 1

Tags

NGSS.HS-PS2-4

What is the overall charge on an atom?

• positive

• no charge

• negative

What does the atomic mass number tell us about an atom?

• The number of protons

• The number of neutrons

• The number of protons and neutrons

• The number of protons and electrons

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

• An atom of sodium has 11 protons, 11 electrons, and 11 neutrons.

• An atom of sodium has 11 protons, 12 electrons, and 11 neutrons.

• An atom of sodium has 11 protons, 11 electrons, and 12 neutrons.

• An atom of sodium has 11 protons, 12 electrons, and 12 neutrons.

Tags

NGSS.MS-PS1-1

An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain?

• 15

• 16

• 31

Tags

NGSS.MS-PS1-1

Complete the following sentence: 'Different isotopes of the same element have...'

• ...the same number of protons, but differing numbers of neutrons and electrons

• ...the same number of neutrons, but differing numbers of protons and electrons

• ...the same number of protons and neutrons, but differing numbers of electrons

• ...the same number of protons and electrons, but differing numbers of neutrons

Tags

NGSS.HS-PS1-8