Atomic Mass Number

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

• 6

• 10

• 4

• 8

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

• ions

• isotopes

• quarks

• molecules

What is the atomic mass for nickel?

• 58.693

• 28

• 30.693

• 86.693

If the atomic mass is not given, how do we calculate it?

• (protons) + (electrons)

• (atomic mass) - (atomic number)

• (protons) - (neutrons)

• (protons) + (neutrons)

How many electrons are in an atom of strontium?

• 125.62

• 87.62

• 49.62

• 38

Tags

NGSS.MS-PS1-1

How many neutrons are in an atom of zirconium?

• 51.224

• 131.224

• 40

• 80

Tags

NGSS.MS-PS1-1

What is the number of electrons in chlorine atom ?

• 35

• 11

• 18

• 17

Tags

NGSS.MS-PS1-1

What is the atomic mass number of an element with 8 protons and 8 neutrons?

• 14

• 16

• 8

• 18

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

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Only protons

An element has an atomic number of 11 and a mass number of 23. How many neutrons does it have?

• 11

• 12

• 23

• 34