Atomic Structure Review

How many neutrons are in an atom of yttrium-89?

• 89

• 39

• 50

• 128

Tags

NGSS.HS-PS1-8

How many electrons are in a sulfur-31 ion with a -2 charge?

• 33

• 29

• 14

• 18

Tags

NGSS.HS-PS1-1

Who discovered the nucleus and with what experiment?

• Thomson with the gold foil experiment.

• Thomson with the cathode ray experiment.

• Rutherford with the gold foil experiment.

• Rutherford with the cathode ray experiment.

Which subatomic particle is associated with the formation of isotopes?

• protons

• neutrons

• electrons

• nucleus

Tags

NGSS.HS-PS1-8

Which subatomic particle is associated with the formation of ions?

• protons

• neutrons

• electrons

• nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which subatomic particle relays the identity of an atom?

• protons

• neutrons

• electrons

• nucleus

An atom contains 106 protons, 106 electrons, and 163 neutrons. What is its atomic number?

• 106

• 163

• 269

• 57

What is the ionic charge of an atom that has 74 protons, 110 neutrons, and 70 electrons?

• +4

• -4

• +40

• -40

A metal loses electrons. Which of the following is true?

• It becomes positively charged and is called a cation.

• It becomes positively charged and is called an anion.

• It becomes negatively charged and is called a cation.

• It becomes negatively charged and is called an anion.

What is the atomic mass of an element that is made up of two isotopes: Isotope A whose mass is 51.99amu and makes up 28.75% of the element, and Isotope B whose mass is 54.89amu and makes up the rest of the element?

• 53.44amu

• 54.61amu

• 54.06amu

• 69.84amu