Mass Number

Protium, Deuterium and Tritium are isotopes of the element Hydrogen.

Why does Tritium have a greater mass number than both Protium and Deuterium?

• It has more protons

• It has more neutrons

• It is electrically neutral

• It has more electrons

Tags

NGSS.MS-PS1-1

What is the mass number of a nitrogen atom that has 8 neutrons?

• 15

• 14

• 22

• 8

Tags

NGSS.MS-PS1-1

What is the mass number of an atom that contains 9 protons, 10 neutrons, and 9 electrons?

• 9

• 10

• 18

• 19

Tags

NGSS.MS-PS1-1

Scandium is an element with the symbol Sc. Which of the following statements are true about the isotope Scandium-45?

• This isotope has 45 protons

• The atomic number of this isotope is 45

• This isotope has 45 neutrons

• This isotope's nucleus contains 45 subatomic particles

Tags

NGSS.MS-PS1-1

What is true about the carbon atom depicted in the image?

• This carbon atom has 13 protons

• There are 13 subatomic particles in the electron cloud

• The mass number of this carbon atom is 13

• The atomic number of this carbon atom is 13

Tags

NGSS.MS-PS1-1

What is the mass number of an atom that contains 8 protons, 9 neutrons, and 8 electrons?

• 8

• 9

• 16

• 17

Tags

NGSS.MS-PS1-1

What is the mass number of a calcium atom that has 21 neutrons?

• 20

• 21

• 41

• 40

Tags

NGSS.MS-PS1-1

These three isotopes of carbon have different -

• Atomic numbers

• Mass numbers

• Numbers of protons

• Symbols

Tags

NGSS.MS-PS1-1

All the isotopes of a particular element will always have the same -

• Atomic number

• Mass number

• Number of neutrons

• Total number of subatomic particles

Tags

NGSS.MS-PS1-1

What is the mass number of a beryllium atom that has 3 neutrons?

• 4

• 7

• 9

• 3

Tags

NGSS.MS-PS1-1