Atomic Mass Calculation

What two particles make up the ATOMIC MASS of an element?

• Protons and Neutrons

• Protons and Electrons

• Electrons and Nucleus

• Electrons and Neutrons

Tags

NGSS.MS-PS1-1

Calculation used to find the number of neutrons in an atom

• Mass Number- Atomic Number

• Atomic Number - Mass Number

• Mass Number - Electrons

• protons = electrons = neutrons

Measure mainly of the nuclear particles: protons + neutrons

• Subatomic Particles

• Atomic Number

• Atomic Mass

• Gluons

Tags

NGSS.HS-PS1-8

Calculation used to find the number of neutrons in an atom

• Atomic Mass - Atomic Number

• Atomic Number - Atomic Mass

• Atomic Mass - Electrons

• none of these

What is the atomic mass of calcium-40?

• 20

• 60

• 40

• 41

Tags

NGSS.MS-PS1-1

What is the atomic mass of an element with 20 protons, 20 neutrons, and 20 electrons?

• 40

• 20

• 60

• 80

Tags

NGSS.MS-PS1-1

Which of the following particles contribute to the atomic mass of an atom?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Only protons

How is the atomic mass of an isotope calculated?

• Sum of protons and electrons

• Sum of protons and neutrons

• Sum of neutrons and electrons

• Sum of all subatomic particles

An element has an atomic number of 15 and a mass number of 31. How many neutrons does it have?

• 15

• 16

• 31

• 46

Which of the following is the correct formula for calculating atomic mass?