Atomic Mass Number

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

Atoms of the same element which have a different number of neutrons are called .

(a)  

• isotopes

• ions

• quarks

• molecules

How many neutrons does C-14 contain? (tap to enlarge the image)

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

How many neutrons does an atom of the isotope Neon-22 have? (tap to enlarge the image)12

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

which atom has  4 neutrons?

• Li-6

• Li-7

• Li-8

• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

The average atomic mass of an element is the ___.

• average of the mass number and the atomic number for the element

• average of the masses of the isotopes of the element

• total mass of the isotopes of the element

• total number of subatomic particles in the nucleus

What is the mass number defined as?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of protons and electrons

What is the atomic mass number of an element?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The number of electrons in the atom

Which of the following particles contribute to the atomic mass number?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Only protons

How does the atomic mass number differ from the atomic number?

• Atomic mass number includes electrons, atomic number does not

• Atomic mass number is the sum of protons and neutrons, atomic number is only protons

• Atomic mass number is the sum of protons and electrons, atomic number is only neutrons

• Atomic mass number is the sum of neutrons and electrons, atomic number is only protons