Determining Protons, Neutrons, and Electrons from the Periodic Table

What does the atomic number of an element represent?

• Atomic mass

• Number of neutrons

• Number of electrons and protons

• Number of isotopes

How can you find the number of electrons in a neutral atom?

• Subtract the number of neutrons from the atomic mass

• It's the same as the atomic number

• Add the number of protons and neutrons

• Subtract the atomic number from the mass number

What is the significance of the atomic mass?

• It's the sum of protons and electrons

• It represents the number of isotopes

• It's the weighted average of all isotopes' masses

• It's the total number of protons

Tags

NGSS.HS-PS1-7

How do you calculate the number of neutrons in an atom?

• Number of protons minus number of electrons

• Atomic mass minus number of protons

• Mass number minus atomic number

• Atomic number minus atomic mass

What is the symbol for Silver?

• Si

• Au

• S

• Ag

How many neutrons are in Silver?

• 47

• 107

• 108

• 61

How many protons does Potassium have?

• 19

• 39

• 40

• 20

Tags

NGSS.MS-PS1-1

How many electrons does Tin (Sn) have in a neutral state?

• 50

• 119

• 118

• 69

What is the atomic number of Fluorine?

• 19

• 17

• 9

• 10

What is the mass number of Fluorine?

• 10

• 9

• 19

• 18