Atomic Structure Basics

What is the atomic number of an element?

• Number of protons

• Number of electrons

• Number of neutrons

• Number of isotopes

Name the three subatomic particles found in an atom.

• Positrons

• Protons, Neutrons, Electrons

• Quarks

• Photons

Answer explanation

The three subatomic particles found in an atom are Protons, Neutrons, and Electrons.

Which subatomic particle has a positive charge?

• Neutron

• Electron

• Proton

• Photon

How many protons are present in the nucleus of an atom with atomic number 20?

• 20

• 18

• 25

• 22

How many neutrons are there in the most common isotope of Boron? ​ (a)  

• 6

• 5

• 1

• 11

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How many protons does chlorine have?

• 35

• 36

• 17

• 18

Label the parts of an atom

a

b

c

d

e

Nucleus

Electron cloud

Electron

Proton

Neutron

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NGSS.MS-PS1-1

How many protons, neutrons, and electrons does sulfur have? It's atomic number is 16 and it's atomic mass is 32.

• 16 protons, 16 neutrons, and 16 electrons

• 16 protons, 32 neutrons, and 16 electrons

• 16 protons, 16 neutrons, and 32 electrons

• 32 protons, 16 neutrons, and 16 electrons.

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NGSS.MS-PS1-1

Label the following item

a

b

c

Neutron

Electron

Proton

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NGSS.MS-PS1-1

How many protons are in an atom of iron?

Mathematical Equivalence

ON

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